Beam Shaper (DOE)

Beam Shaper (DOE)

Keywords: Diffractive Optic Elements,DOE,beam shaper,top-hat

A Top-Hat beam shaper converts a Gaussian input laser beam into a uniform intensity beam of any shape and size requested by the customer. The beam shaping element is a diffractive optical element (DOE) used to transform a near-gaussian incident laser

Beam Shaper

A diffractive beam shaper allows you to modify the intensity and phase profiles of spatially coherent lasers. Through in-phase manipulation of the input beam, you can achieve virtually limitless and, most importantly, speckle-free intensity profiles in the output beam. This requires reliable and accurate knowledge of the input beam and phase profile.

You can optimize the performance and overall efficiency of your system, which could be in the application of laser material processing, in the field of lithography and holographic lighting as well as for biomedical devices and optical sensors.

With our high-performance beam shapers, you can create uniform top-hat, circular rectangular, or linear intensity profiles as well as all manner of distributions and geometries – all according to your own specific requirements and applications. We design our beam shapers to be perfectly compatible with single-mode (TEM00) input beams. We also produce refractive or diffractive diffusers and homogenizers for use with multi-mode lasers to integrate the multi-mode beam. These cover a wavelength range from DUV to LWIR.

Diffractive Line Generators

Single-mode lasers such as solid-state lasers, fiber lasers, diode lasers, gas lasers and frequency-doubled or -tripled lasers feature a Gaussian beam profile. These Gaussian profiles can´t be readily used for optimal for uniform lighting applications.

Diffractive line generators from Sintec use a single surface element without additional optics to convert a Gaussian laser beam into a uniform, one-dimensional top-hat profile. Uniform and speckle-free lines are ideal for material processing applications, such as annealing or recrystallization of semiconductors and thin layers. This type of illumination can be designed to create lines at normal incidence or even on highly tilted planes.

Diffractive Diffuser

You use diffractive diffusers from Sintec to absorb a monochromatic laser beam and scatter the light into any imaginable pattern. Like the diffractive beam splitter, the diffuser converts an input beam into a multitude of output beams, the angle and intensity of which can be controlled.

However, in contrast with the beam splitter, these beams overlap and interfere, generating a new, homogenized distribution.
Diffractive diffusers are therefore ideal for laser applications, in which a specific laser beam shape is required, similarly to refractive homogenizers. They also allow you to realize uniform performance for a specific range at a defined distance from the light source. The optical elements achieve a uniformity of 3 to 5%, whereby the shape of the light distribution can be round, rectangular or freely selectable.

Our diffractive diffusers feature a strictly controlled beam angle, which guarantees you particularly high levels of efficiency. The diffusers are not alignment sensitive and have no impact on the polarization of the input beam. This makes the diffractive diffusers ideal for applications requiring rapid sensing of large areas, in the fields of remote sensing or LIDAR/LADAR, for example. The diffusers cover the wavelength range from DUV to infrared.

Gaussian Generator

The diffractive Gaussian generators from Sintec represent a special type of diffractive diffuser and are ideally suited for high-power lasers such as excimer, nitrogen or diode lasers. They convert non-Gaussian laser beams into accurately defined, reproducible Gaussian far-field profiles.

Such intensity profiles are ideal for overlapping laser beam processing – for example, during material processing and medical laser treatment or for printing technology and measuring systems. We can provide you with DOEs for wavelengths ranging from UV to NIR.

Beam Shaper (Top Hat)

1. STR Series Beam Shapers

A Top-Hat beam shaper converts a Gaussian input laser beam into a uniform intensity beam of any shape and size requested by the customer.

The beam shaping element is a diffractive optical element (DOE) used to transform a near-gaussian incident laser beam into a uniform-intensity spot of either round, rectangular, square, line or other shape with sharp edges in a specific work plane.

A uniform spot enables equal treatment to a surface, excluding over/under-exposure of specific areas. In addition, the spot is characterized by a sharp transition region that creates a clear border between the treated and untreated area.

The beam shaping can be a:

Focal Beam Shaping: Hybrid element (lens) or module which give a Top-Hat intensity distribution at a specific working distance (BFL of the lens or distance from exit location of the module to Top-Hat plane).

Angular Beam Shaping: Optical element (window) which gives a Top-Hat intensity distribution at infinity or focal length of aberration free customer's lens.

M-Shaper: Optical element (window) which gives a uniform exposure over scanned lines.

Focal Beam Shaper standard elements

PN Wavelength [nm] Beam Dia [mm] WD [mm] Spot Size Element Size [mm] Image Shape
TH-042-U-Y-A 355 2.5 50 50 um 25.4 Round
TH-245-U-Y-A 355 12 50 45x10um 25.4 Rectangular
ST-202-U-Y-A 355 14 50 50x6 um 25.4 Rectangular
ST-203-I-Y-A 1064 6 52 50x50 um 25.4 Square
ST-204-Q-Y-A 532 6 52 30 x 30 um 25.4 Square
TH-241-W-Y-A 266 8 200 1mm 25.4 Line
TH-235-U-Y-A 355 12 700 10mm 27.94 Line
ST-209-Q-Y-A 532 2 104.76 150x200um 12.7 Rectangular
ST-211-A-Y-A 10600 11 38 125x200um 27.94 Rectangular
ST-215-U-Y-A 355 14 47.8 6x34um 25.4 Rectangular
ST-216-U-Y-A 355 14 47.8 6x38um 25.4 Rectangular
ST-217-U-Y-A 355 14 47.8 6x42um 25.4 Rectangular
TH-234-A-Y-A 10600 14 95 250um 27.94 Round
TH-233-A-Y-A 10600 12 63.5 0.25x2.5mm 27.94 Rectangular
TH-223-A-Y-A 10600 2.4 565 27.8x27.8mm 15 Square
TH-222-Q-Y-A 532 2.9 40 200um 12.7 Line
TH-219-A-Y-A 10600 12 63.5 0.25x1.5mm 27.94 Rectangular
TH-217-U-Y-A 355 2 100 100x100um 12.7 Square
TH-009-A-Y-A 10600 10 63.5 280x280 um 27.94 Square
TH-011-A-Y-A 10600 25 250 3 mm 38.1 Round
TH-216-Q-Y-A 532 12 720 10x10mm 25.4 Square
TH-014-I-Y-A 1064 7 42.52 190 um 20 Round
TH-017-I-Y-A 1064 39 20000 635x5.3 mm 50 Rectangular
TH-018-I-Y-A 1064 13 20000 635x635 mm 38.1 Square
TH-019-I-Y-A 1064 3.5 100 210x210 um 25.4 Square
TH-209-U-Y-A 355 9x6 200 100 um 25.4 Round
TH-208-A-Y-A 10600 13 150 5 mm 27.94 Line
TH-207-U-Y-A 355 3.5 99.35 200x200 um 25.4 Square
TH-034-Q-Y-A 532 2.5 99.5 100x100 um 25.4 Square
TH-035-Q-Y-A 532 2.5 99.5 90 um 25.4 Round
TH-036-Q-Y-A 532 3.5 100 200x200 um 25.4 Square
ST-201-A-Y-A 10600 16.5 187.5 360um 38.1 Round
TH-043-U-Y-A 355 8 49.8 15 um 20 Round
TH-205-A-Y-A 10600 4 100 1.5mm 25.4 Round
TH-045-U-Y-A 355 1.65 94 170x170 um 12.7 Square
TH-046-U-Y-A 355 2.5 95 61x61um 12.7 Square
TH-051-W-Y-A 266 5 42 15 um 25.4 Round
TH-101-I-Y-A 1064 3 100 150 um 25.4 Round
TH-102-I-Y-A 1064 6 100 150 um 25.4 Round
TH-103-I-Y-A 1064 9 1000 10x10 mm 25.4 Square
TH-202-A-Y-A 10600 14.5 79.5 370um 20 Round
TH-203-D-Y-A 2940 4 80 200 um 11 Round
TH-204-Q-Y-A 532 3.5 105 200x200um 25.4 Square
ST-200-C-Y-A 9250 12 63.5 260x260um 27.94 Square
TH-032-Q-Y-A 532 10.9 200 2mm @FWHM 25.4 Round
TH-031-Q-Y-A 532 5 52.4 100 um 25.4 Round
TH-005-C-Y-A 9250 12 62.9 350 um 27.94 Round
TH-226-A-Y-A 10600 4 100 3x3mm 20 Square
TH-231-I-Y-A 1064 5 100 0.2x0.6mm 12.7 Rectangular
TH-004-A-Y-A 10600 12 63.4 390 um 27.94 Round
TH-003-A-Y-A 10600 3.7 41 650um 12.7 Line
TH-244-U-Y-A 355 12 50 35x13um 25.4 Rectangular
TH-033-X-Y-A 800 6 200 3 mm 25.4 Round
TH-012-H-Y-A 1319 7 43.2 170 um 20 Round
TH-008-C-Y-A 9250 10 62.9 260x260 um 27.94 Square
TH-232-X-Y-A 1070 12 150 300x300um 38.1 Square
TH-007-C-Y-A 9250 25 121 14.2X1.7 mm 38.1 Rectangular
TH-006-A-Y-A 10600 25 125 15X1 mm 38.1 Rectangular
ST-208-X-Y-A 1070 14 75 500x500um 30 Square
ST-205-I-Y-A 1064 7 100 210x210um 25.4 Square
TH-044-1-Y-A 337 8 49.4 20 um 20 Round
TH-224-X-Y-A 1070 14 75.76 1x1mm 38.1 Square

Angular Beam Shaper

PN λ [nm] Beam Dia [mm] θf [mRad] Image size*** [um] for EFL=100mm Element Size [mm] Image Shape Remarks
TH-238-I-Y-A 1064 3 6 600 11 Round
ST-206-I-Y-A 1064 10 2.7 270 25.4 Line
ST-219-I-Y-A 1064 4 0.52 52 11 Round Binary TH
ST-225-I-Y-A 1064 4.5 0.47 47 25.4 Square Binary TH
ST-234-I-Y-A 1064 7 0.3 30 25.4 Square Binary TH
ST-237-I-Y-A 1064 9 0.23 23 25.4 Round Binary TH
ST-241-I-Y-A 1064 10 0.2 20 25.4 Round Binary TH
PT-001-I-N-A 1064 6 0.56 56 30 Square
TH-258-I-Y-A 1064 10 0.48 48 25.4 Square
ST-212-I-Y-A 1064 7 1 100 20 Square
ST-277-I-Y-A 1064 7 0.3 30 25.4 Line Binary TH
TH-227-I-Y-A 1064 3 13.3 1330 11 Round
ST-283-I-Y-A 1064 12 0.36x1.80 36.0x180.0 25.4 Rectangular
TH-215-I-Y-A 1064 6 1 100 25.4 Round
ST-286-I-Y-A 1064 12 0.35x2.70 35.0x270.0 25.4 Rectangular
TH-015-I-Y-A 1064 5.1 14.5 1450 25.4 Line
TH-013-I-Y-A 1064 7 17.5 1750 25.4 Square
ST-303-I-Y-A 1064 7.5 0.28 28 25.4 Round Binary TH
ST-221-I-Y-A 1064 4.7 0.44 44 25.4 Round Binary TH
ST-238-I-Y-A 1064 10 0.2 20 25.4 Square Binary TH
ST-239-I-Y-A 1064 6 0.35 35 25.4 Round Binary TH
ST-240-I-Y-A 1064 8 0.26 26 25.4 Round Binary TH
ST-222-I-Y-A 1064 5 0.41 41 25.4 Round Binary TH
PT-002-I-Y-A 1064 7.5 45.18x2.64 4518.8x264.0 40x40 Rectangular
ST-259-I-Y-A 1064 2 1.04 104 11 Round Binary TH
ST-260-I-Y-A 1064 3 0.69 69 11 Round Binary TH
PT-001-I-Y-A 1064 6 0.56 56 30 Square
ST-289-I-Y-A 1064 3.5 0.6 60 11 Round Binary TH
TH-249-I-Y-A 1064 3.2 0.74 74 12.5 Line Binary TH
TH-246-I-Y-A 1064 6 4.2 420 25.4 Round
TH-239-I-Y-A 1064 4.7 0.51 51 12.5 Line Binary TH
ST-227-I-Y-A 1064 4 2 200 11 Frame Binary TH
ST-267-I-Y-A 1064 2 1.04 104 11 Line Binary TH
ST-268-I-Y-A 1064 3 0.69 69 11 Line Binary TH
ST-269-I-Y-A 1064 4 0.52 52 11 Line Binary TH
ST-270-I-Y-A 1064 5 0.43 43 11 Line Binary TH
ST-271-I-Y-A 1064 2 1.3 130 11 Round Binary TH
ST-272-I-Y-A 1064 3 0.87 87 11 Round Binary TH
ST-273-I-Y-A 1064 5 0.52 52 25.4 Round Binary TH
ST-275-I-Y-A 1064 8 0.26 26 25.4 Line Binary TH
ST-276-I-Y-A 1064 10 0.21 21 25.4 Line Binary TH
ST-228-I-Y-A 1064 4 24 2400.1 11 Frame Binary TH
ST-278-I-Y-A 1064 9 0.23 23 25.4 Line Binary TH
ST-229-I-Y-A 1064 4 12 1200 11 Square Binary TH
TH-221-I-Y-A 1064 2.2 3.2 320 11 Square Binary TH
ST-281-I-Y-A 1064 6 0.34 34 25.4 Line Binary TH
ST-282-I-Y-A 1064 6 0.34 34 25.4 Square Binary TH
ST-230-I-Y-A 1064 7 0.29 29 20 Round Binary TH
TH-220-I-Y-A 1064 1.125 6.2 620 11 Square Binary TH
ST-231-I-Y-A 1064 3 8.7 870 11 Line Binary TH
ST-232-I-Y-A 1064 3 17.67 1767 11 Line Binary TH
ST-220-I-Y-A 1064 4 0.53 53 11 Square Binary TH
ST-235-I-Y-A 1064 8 0.26 26 25.4 Square Binary TH
ST-315-I-Y-A 1064 1.5 1.39 139 11 Square Binary TH
ST-290-I-Y-A 1064 3.5 0.6 60 11 Square Binary TH
ST-291-I-Y-A 1064 2 1.02 102 11 Square Binary TH
ST-292-I-Y-A 1064 2.5 0.81 81 11 Square Binary TH
ST-293-I-Y-A 1064 3 0.68 68 11 Square Binary TH
ST-294-I-Y-A 1064 2.5 0.83 83 11 Line Binary TH
ST-295-I-Y-A 1064 3.5 0.59 59 11 Line Binary TH
ST-296-I-Y-A 1064 4.5 0.46 46 11 Line Binary TH
ST-297-I-Y-A 1064 2.5 0.84 84 11 Round Binary TH
ST-298-I-Y-A 1064 4.5 0.47 47 11 Round Binary TH
ST-299-I-Y-A 1064 5.7 0.4 40 11 Round Binary TH
ST-300-I-Y-A 1064 5.7 0.49 49 11 Round Binary TH
ST-301-I-Y-A 1064 5.7 0.37 37 12.5 Round Binary TH
ST-302-I-Y-A 1064 5.7 0.48 48 12.5 Round Binary TH
ST-236-I-Y-A 1064 9 0.23 23 25.4 Square Binary TH
ST-307-I-Y-A 1064 1 2.08 208 11 Round Binary TH
ST-308-I-Y-A 1064 1 2.08 208 11 Square Binary TH
ST-312-I-Y-A 1064 1 2.08 208 11 Line Binary TH
ST-313-I-Y-A 1064 1.5 1.39 139 11 Line Binary TH
ST-314-I-Y-A 1064 1.5 1.39 139 11 Round Binary TH
ST-263-I-Y-A 1064 12 0.36x2.39 36.0x239.0 25.4 Rectangular
ST-207-I-Y-A 1064 10 0.6 60 25.4 Round
ST-288-I-Y-A 1064 12 0.36x3.30 36.0x330.0 25.4 Rectangular
ST-287-I-Y-A 1064 12 0.35x2.99 35.5x299.0 25.4 Rectangular
ST-285-I-Y-A 1064 12 0.36x2.40 36.0x240.0 25.4 Rectangular
ST-284-I-Y-A 1064 12 0.36x2.10 36.0x210.0 25.4 Rectangular
ST-280-I-Y-A 1064 12 0.36x3.30 36.5x330.0 25.4 Rectangular
TH-225-I-Y-A 1064 1.2 23.7 2370.1 11 Dollar
ST-279-I-Y-A 1064 12 0.36x3.00 36.0x300.0 25.4 Rectangular
TH-228-I-Y-A 1064 3 10 1000 11 Round
TH-236-I-Y-A 1064 6 7.2 720 25.4 Grid 10x10 cells
TH-237-I-Y-A 1064 6 7.2 720 25.4 11 lines
ST-266-I-Y-A 1064 12 0.37x2.40 36.9x239.5 25.4 Rectangular rounded corners
ST-265-I-Y-A 1064 12 0.37x2.09 37.2x209.1 25.4 Rectangular rounded corners
ST-264-I-Y-A 1064 12 0.36x2.69 36.5x269.0 25.4 Rectangular
TH-248-I-Y-A 1064 5 5.60x0.94 560.0x94.0 25.4 Rectangular
TH-002-I-Y-A 1064 12 2.4 240 27.94 Square
TH-252-I-Y-A 1064 6 20 2000.1 25.4 Round
TH-253-I-Y-A 1064 12 0.65x2.97 65.0x297.0 25.4 Rectangular
TH-254-I-Y-A 1064 12 0.81x2.36 81.0x236.0 25.4 Rectangular
TH-255-I-Y-A 1064 12 1.10x1.77 110.0x177.0 25.4 Rectangular
TH-256-I-Y-A 1064 12 0.40x4.79 40.0x479.0 25.4 Rectangular
TH-257-I-Y-A 1064 12 0.36x5.39 36.0x539.0 25.4 Rectangular
ST-262-I-Y-A 1064 12 0.36x2.10 36.0x210.0 25.4 Rectangular
TH-259-I-Y-A 1064 6 3.19 319 25.4 Square
TH-260-I-Y-A 1064 6 1.71 171 25.4 Square
TH-105-I-Y-A 1064 7.5 0.54 54 25.4 Round
ST-261-I-Y-A 1064 12 0.36x1.78 35.8x178.0 25.4 Rectangular
ST-258-I-Y-A 1064 10 3.9 390 25.4 Line
ST-223-I-Y-A 1064 6 3 300 25.4 Line
PT-003-I-Y-A 1064 3.2 22.77 2277.1 12.7x12.7 Line
PT-005-I-Y-A 1064 5 3.29 329 25.4 Round
PT-006-I-Y-A 1064 2 40.30x57.10 4030.5x5711.6 12.7 Elliptical

Small Angle Top Hat standard

Small Beam Shaper for scanning application (~1.5X Diffraction Limit)

Laser beams with Top-hat energy distribution are being used for different applications in the laser material processing industry. Most systems in this industry include scanners and F-θ lenses in order to direct and focus the beam on the substrate. HoloOr is proud to introduce a new design for ~1.5x(Diffraction limit) beam shapers DOEs (Diffractive Optical Element) which is considerably cheaper than regular Top-hats. Those DOEs are specially designed to operate with scanners/F-θ lenses under high power lasers. Placing the beam shaper DOE before the scanner will create a top-hat energy distribution at the F-θ lens working plane. The use of this beam shaper does not affect the focal length of the system.

2. STO Series Flat-top Beam Shaping Elements for a Gaussian beam with a specific beam size and good beam quality

A laser beam with a top-hat uniform intensity distribution is desired in many applications. A top-hat beam is also called a flat-top beam or a super-Gaussian beam. Basically we have 4 different methods to homogenize a laser beam, i.e.

  • flat-top beam shaping for a Gaussian beam with a specific beam size and good beam quality
  • low speckle or speckle-free beam homogenizing tolerant to incident beam size and beam quality
  • beam homogenizing with speckles, tolerant to incident beam size and beam quality
  • beam homogenizing for incoherent beams with microlenses

2.1 Flat-top beam shaping for a Gaussian beam with a specific beam size and good beam quality

The products were designed and fabricated based on our first method of homogenizing an incident laser beam. Product nomination for diffractive top-hat beam-shaping elements is as follows:

STO-TH-22-33-44-55-66-77

STO means STO series DOEs for flat-top beam shaping elements; TH means top hat; 22 means beam shape (RD means round, REC means rectangle); 33 means element size in mm; 44 means input beam diameter in mm; 55 means working distance in mm (INF means infinite via a lens); 66 means image size in mm or diffraction angle in degree or rad when working distance is infinite; 77 means wavelength. For example, STO-TH-RD-8-3.5-INF-1.4DEG-532.

Our standard top-hat beam shaping elements include Gaussian beam to rectangular flat-top beam and Gaussian beam to circular flat-top beam.

(1) Gaussian beam to rectangular flat-top beam

Part No DOE dimensions Image size Wavelength Working distance
STO-TH-REC-8-2-INF-20mrad-1064 8 mm 20 mrad 1064 nm Infinite
STO-TH-REC-8-2-200-4x4-1064 8 mm 4x4 mm 1064 nm 200 mm
STO-TH-REC-8-2.5-INF-20mrad-1064 8 mm 20 mrad 1064 nm Infinite
STO-TH-REC-8-2.5-200-4x4-1064 8 mm 4x4 mm 1064 nm 200 mm
STO-TH-REC-8-3-INF-20mrad-1064 8 mm 20 mrad 1064 nm Infinite
STO-TH-REC-8-3-200-4x4-1064 8 mm 4x4 mm 1064 nm 200 mm
STO-TH-REC-8-3.5-INF-20mrad-1064 8 mm 20 mrad 1064 nm Infinite
STO-TH-REC-8-3.5-200-4x4-1064 8 mm 4x4 mm 1064 nm 200 mm
STO-TH-REC-10-4-INF-20mrad-1064 8 mm 20 mrad 1064 nm Infinite
STO-TH-REC-10-4-200-4x4-1064 8 mm 4x4 mm 1064 nm 200 mm
STO-TH-REC-20-8-INF-2.9 mrad-1064 20 mm 2.9 mrad 1064 nm Infinite
STO-TH-REC-20-8-1700-5x5-1064 20 mm 5x5 mm 1064 nm 1700 mm
STO-TH-REC-8-3.5-100-0.5x0.5-532 8 mm 0.5x0.5 mm 532 nm 100 mm
STO-TH-REC-8-3-200-4x4-532 8 mm 4x4 mm 532 nm 200 mm
STO-TH-REC-8-3.5-200-0.5x0.5-532 8 mm 0.5x0.5 mm 532 nm 200 mm
STO-TH-REC-8-3.5-200-1x1-532 8 mm 1x1 mm 532 nm 200 mm
STO-TH-REC-8-3.5-INF-5mrad-532 8 mm 5 mrad 532 nm Infinite
STO-TH-REC-8-3.5-100-4.0x4.0-532 8 mm 4.0x4.0 mm 532 nm 100 mm
STO-TH-REC-8-3.5-200-4.0x4.0-532 8 mm 4.0x4.0 mm 532 nm 200 mm
STO-TH-REC-8-3.5-INF-40mrad-532 8 mm 40 mrad 532 nm Infinite
STO-TH-REC-10-4.0--100-0.5x0.5-532 10 mm 0.5x0.5 mm 532 nm 100 mm
STO-TH-REC-10-4.0-INF-5mrad-532 10 mm 5 mrad 532 nm Infinite
STO-TH-REC-10-4.0-100-6.0x6.0-532 10 mm 6.0x6.0 mm 532 nm 100 mm
STO-TH-REC-10-4.0--INF-59.9mrad-532 10 mm 59.9 mrad 532 nm Infinite
STO-TH-REC-12-5.0-100-0.2x0.2-532 12 mm 0.2x0.2 mm 532 nm 100 mm
STO-TH-REC-12-5.0--INF-20mrad-532 12 mm 2 mrad 532 nm Infinite
STO-TH-REC-12-5.0-100-0.5x0.5-532 12 mm 0.5x0.5 mm 532 nm 100 mm
STO-TH-REC-12-5.0-INF-5mrad-532 12 mm 5 mrad 532 nm Infinite
STO-TH-REC-12-5.0-200-8.0x8.0-532 12 mm 8.0x8.0 mm 532 nm 200 mm
STO-TH-REC-12-5.0-INF-40mrad-532 12 mm 40.0 mrad 532 nm Infinite
STO-TH-REC-20-8.0-200-12x12-532 20 mm 12x12 mm 532 nm 200 mm
STO-TH-REC-20-8.0-INF-99.7mrad-532 20 mm 99.7 mrad 532 nm Infinite

(2) Gaussian beam to circular flat-top beam:

Part No DOE dimensions Image size Wavelength Working distance
STO-TH-RD-8-3.5-100-0.05-532 8 mm 0.05 mm 532 nm 100 mm
STO-TH-RD-8-3.5-INF-0.5mrad-532 8 mm 0.5 mrad 532 nm infinite
STO-TH-RD-8-3.5-100-0.1-532 8 mm 0.1 mm 532 nm 100 mm
STO-TH-RD-8-3.5--INF-1mrad-532 8 mm 1 mrad 532 nm infinite
STO-TH-RD-8-3.5-100-0.2-532 8 mm 0.2 mm 532 nm 100 mm
STO-TH-RD-8-3.5-INF-2mrad-532 8 mm 2 mrad 532 nm infinite
STO-TH-RD-8-3.5-100-0.5-532 8 mm 0.5 mm 532 nm 100 mm
STO-TH-RD-8-3.5-INF-5mrad-532 8 mm 5 mrad 532 nm infinite
STO-TH-RD-10-4.0-100-0.05-532 10 mm 0.05 mm 532 nm 100 mm
STO-TH-RD-10-4.0-INF-0.5mrad-532 10 mm 0.5 mrad 532 nm infinite
STO-TH-RD-10-4.0-100-0.1-532 10 mm 0.1 mm 532 nm 100 mm
STO-TH-RD-10-4.0-INF-1mrad-532 10 mm 1 mrad 532 nm infinite
STO-TH-RD-10-4.0-100-0.2-532 10 mm 0.2 mm 532 nm 100 mm
STO-TH-RD-10-4.0-INF-2mrad-532 10 mm 2 mrad 532 nm infinite
STO-TH-RD-10-4.0-100-0.5-532 10 mm 0.5 mm 532 nm 100 mm
STO-TH-RD-10-4.0-INF-5mrad-532 10 mm 5 mrad 532 nm infinite
STO-TH-RD-12-5.0-100-0.05-532 12 mm 0.05 mm 532 nm 100 mm
STO-TH-RD-12-5.0-INF-0.5mrad-532 12 mm 0.5 mrad 532 nm infinite
STO-TH-RD-12-5.0-100-0.1-532 12 mm 0.1 mm 532 nm 100 mm
STO-TH-RD-12-5.0-INF-1mrad-532 12 mm 1 mrad 532 nm infinite
STO-TH-RD-12-5.0-100-0.2-532 12 mm 0.2 mm 532 nm 100 mm
STO-TH-RD-12-5.0-INF-2mrad-532 12 mm 2 mrad 532 nm infinite
STO-TH-RD-12-5.0-100-0.5-532 12 mm 0.5 mm 532 nm 100 mm
STO-TH-RD-12-5.0-INF-5mrad-532 12 mm 5 mrad 532 nm infinite

2.2 Beam homogenizing tolerant to incident beam size and beam quality

Part Number DOE receiving size Wavelength Diffraction angle Description
STO-SFH-RD-12p5-25DEG-785 12.5x12.5mm 785nm 25degree
STO-SFH-RD-12.5-25DEG-785-S 12.5x12.5mm 785nm 25degree Collimation of incident laser beam is not required
STO-SFH-REC-10-83p25x83p25mrad-532 10x10mm 532nm 83.25x83.25
mrad
Equivalent to 0.333x0.333mm @4mm working distance
STO-SFH-REC-50-4p3x11mrad-1064 Φ50mm 1064nm 4.3x11mrad Equivalent to 1.3x3.3mm @ 300mm working distance
STO-SFH-REC-50-2x5p3mrad-1064 Φ50mm 1064nm 2x5.3mrad Equivalent to 0.6x1.6mm @ 300 mm working distance
STO-SFH-REC-50-20x20mrad-1064 Φ50mm 1064nm 20x20mrad Equivalent to 6x6mm @ 300 mm working distance
STO-SFH-REC-25-10mrad-1064 Φ25mm 1064nm 10mrad Equivalent to 3x3mm @ 300 mm working distance
STO-SFH-RD-50-20mrad-1064 Φ50mm 1064nm 20mrad Equivalent to 6 mm in diameter round output spot @ 300 mm working distance
STO-SFH-REC-30-p5xp5mrad-1064 30 x 30mm 1064nm 0.5x0.5mrad Equivalent to a 30x30micron output spot @60mm working distance
STO-SFH-REC-12-p15xp45mrad-355 12 x 12mm 355nm 0.15x0.4mrad Equivalent to a 20x60micron output spot @134mm working distance
STO-SFH-REC-25-p15xp45mrad-355 25 x 25mm 355nm 0.15x0.45

mrad

Equivalent to a 20x60 micron output spot @134mm working distance
STO-SFH-REC-18-4mrad-355 18 x 18mm 355nm 4x4 mrad
STO-SFH-REC-18-5p2mrad-355 18 x 18mm 355nm 5.2x5.2mrad
STO-SFH-REC-12-p45x1p35mrad-1064 12 x 12mm 1064nm
0.45x1.35mrad

2.3 Beam homogenizing with speckles, tolerant to incident beam size and beam quality

The products were designed and fabricated based on our third method of homogenizing an incident laser beam. One main advantage of this type of product is its insensitivity to the incident beam quality and the change of intensity. Hence it is most suitable for the less stable lasers, laser with long pulse duration or multi-pulse laser applications. Due to the lengthy exposure time, the intensity fluctuation can be averaged to some extent. For a circularly symmetric output beam, the variation in intensity can be further impressed by rotating the beam homogenizer.

doe

Item No DOE receiving size Wavelength Diffraction angle
STO-DF-RD-6-2-473 6 x 6 mm 473 nm 2 deg
STO-DF-RD-6-3-589 6 x 6 mm 589 nm 3 deg
STO-DF-RD-6-4-785 6 x 6 mm 785 nm 4 deg
STO-DF-RD-6-4-808 6 x 6 mm 808 nm 4 deg

2.4 Beam homogenizing for incoherent beams with microlenses

We have developed a variety of microlens arrays. The diameter or side length of each individual microlens can be as small as 2 micron. Since 2014, we have managed to increase the upper limit of the diameter or side length of each individual microlens from around 400 micron to 2,000 micron, and managed to increase the lens sag height from around 15 micron to 70 micron. Correspondingly the focal length of the microlens array can be from a few micron to 20,000 micron at visible wavelengths. The shape of the microlens array can be circular, square or hexagon. Specifications outside the ranges stated here are also possible upon customers‘ request.

doe doe

AFM picture of 14 micron microlens array. The non-symmetry is caused by the measurement error of AFM, which is ideal to measure the height differences but may have error during the measurement of continuous profiles.

Part Number Shape Pitch (um) Number of microlens Dimension ROC(um) focal length (um) ROC error
STO-MLA-R14 Round Φ14 7~15 12~36 <+/-5%
STO-MLA-S14 Square 14x14 7~15 12~36 <+/-5%
STO-MLA-S25 Square 25x25 248x184 6.2x4.6 ~17 ~37 <+/-5%
STO-MLA-S80 Square 80x80 625x625 50x50 ~58 ~120 <+/-5%
STO-MLA-S96 Square 96x96 105x210 10x20 1440 ~ 3000 <+/-5%
STO-MLA-S120 Square 120x120 83x126 10x20 2250 ~ 5000 <+/-5%
STO-MLA-R150 Round Φ150 32x32 4.8x4.8 200~690 450~1500 <+/-5%
STO-MLA-S150 Square 150x150 32x32 4.8x4.8 200~690 450~1500 <+/-5%
STO-MLA-S150-170 Square 150x150 148x148 22.2x22.2 138~170 138~170 <+/-5%
STO-MLA-R250 Round Φ250 24x24 6x6 547 ~1000 <+/-5%
STO-MLA-S250 Square 250x250 24x24 6x6 547 ~1000 <+/-5%
STO-MLA-H50-43.3 Hexagon 50x43.3 28.33
(height15 micron)
~62 <+/-5%
STO-MLA-R825-f13000 Round 825 17 x17 14 x14 13000 <+/-5%

M-Shaper

M-Shaper, is a diffractive optical elements (DOE) used to create a unique 2D M-shaped intensity profile, with sharp edges in a specific work plane. The M-Shaper optical function is not possible by conventional reflective or refractive optical elements. The typical application is to create a uniform exposure over scanned lines. That is, when scanning a line with a regular Gaussian or even Top-Hat spot the center gets over exposed (influencing the heat distribution during laser material processing). The M-Shape is the mathematical shape that gives a uniform exposure over the line when scanned. This provides higher quality of the process & enables more flexibility in the system configuration. For example, it allows optimization of the intensity profile, and image size, without changing the laser, fiber cable and/or scanning optical head.

The benefits of our optimized M-shaped intensity profile include:

  • Uniform exposure over the scanned line
  • “Cleaner” results with scanned lines in almost any process
  • Enables very strong weld seams

The most M-Shape DOE’s listed below require a Single Mode (TEM00) input beam. However, some M-Shape DOE’s had been designed for Multimode lasers (with MM in remarks column). Please feel free to contact us on this or any other custom request you may have.

PN λ[nm] Beam Diameter (mm) Image Shape θf [deg] Image size*** [mm] for EFL=100mm
MR-003-I-Y-A 1064 5.3 Round 0.43 43
MR-004-I-Y-A 1064 5.7 Round 0.4 40
MR-006-I-Y-A 1064 10.2 Round 0.23 23
MR-009-I-Y-A 1064 11.3 Round 0.21 21
MR-010-I-Y-A 1064 2.3 Round 1.02 102
MR-013-I-Y-A 1064 4.2 Round 13.32 1332
MR-015-I-Y-A 1064 4.2 Round 6.06 606
MR-002-I-Y-A 1064 4.5 Round 0.52 52
MR-005-I-Y-A 1064 7.9 Round 0.29 29
MR-007-I-Y-A 1064 6.8 Round 0.34 34
MR-008-I-Y-A 1064 9 Round 0.26 26
MR-011-I-Y-A 1064 3.4 Round 0.69 69
MR-001-I-Y-A 1064 8.5 Round 4.26 426
MR-012-I-Y-A 1064 8.4 Round 1.03 103
MR-014-I-Y-A 1064 4.2 Round 10.13 1013
MR-017-I-Y-A 1064 8.4 Round 0.47 47
MR-018-I-Y-A 1064 6 Round 3.21 321
RD-232-I-Y-A 1064 >1.5 Round 34.9 3490.4
RD-247-I-Y-A 1064 >6 Round 8.73 873
RD-254-I-Y-A 1064 >4 Round 17.45 1745
MR-016-I-Y-A 1064 7 Round 3.32 332

Beam Sampler

Diffractive beam samplers are used to monitor high power lasers where optical losses and wavefront distortions of the transmitted beam need to be kept to a minimum. In most applications, most of the incident light must to continue forward, "unaffected," in the "zero order" while a small amount of the beam is diffracted into a higher order, providing a "sample" of the beam. By directing the sampled light in the higher order(s) onto a detector, it is possible to monitor, in real time, not only the power levels of a laser beam, but also its profile. A Laser Beam Sampler allows the high power beam (zero order) to propagate undisturbed along the optical axis, but produces two side beams with low energy. These two sample beams are located to the left and right of the main beam (-1 and +1 orders), and are characterized by a given separation angle between them and by a sample power ratio. It is relatively easy to modify the sampling ratio upon a request of the customer.

PN λ[nm] Sampled Energy [%] Sampled Angle [deg] Element Size [mm]
SA-010-I-Y-A 1064 0.4 15.43 12x12
SA-014-I-Y-A 1064 0.4 15.43 25.4
SA-022-I-Y-A 1064 1.22 2.07 25.4
SA-220-I-Y-A 1064 0.5 10.21 11
SA-020-I-Y-A 1064 1 1.27 27.94
SA-021-I-Y-A 1064 1 1 25.4
SA-219-I-Y-A 1064 0.5 2.44 25.4
SA-204-I-Y-A 1064 0.5 2.07 25.4
SA-206-I-Y-A 1064 1 2.07 25.4
SA-207-I-Y-A 1064 2 10 15
SA-218-I-Y-A 1064 0.5 1 25.4
SA-217-I-Y-A 1064 0.5 2.84 25.4
SA-216-I-Y-A 1064 0.5 3.81 25.4
SA-213-I-Y-A 1064 0.5 9.21 15
SA-215-I-Y-A 1064 0.5 5.09 25.4
SA-208-I-Y-A 1064 2 5.09 15
SA-211-I-Y-A 1064 1 20.77 10x10
SA-209-I-Y-A 1064 3.8 15.43 10.7x10.7
SA-011-I-Y-A 1064 1.6 15.43 12x12
SA-012-I-Y-A 1064 3.8 15.43 12x12
SA-214-I-Y-A 1064 0.5 7.64 9.8x9.8

Ring Generator

A Ring generator transforms a laser beam into a ring (Diffractive axicon) or into a multi-rings (Multi-Circles).

A laser concentric circles pattern transforms a laser beam into multiple circles.

A concentric circles light pattern can be used for certain 3D mapping applications, especially within pipe/tube objects.

A concentric circles pattern was recently proved to be the most appropriate light pattern for certain 3D mapping applications, especially with pipe/tube objects.

Each laser concentric circles is defined by its full angle and its number of rings.

We offer, in addition to its standard products, the possibility to design and manufacture a number of circles, separation angle between the circles and full angle as requested by the customer, as a part of its custom design and manufacturing capability.

We also design and manufacture diffractive axicon which is a DOE that splits an input beam to a single ring.

An Axicon transforms a laser beam into a ring shape (a Bessel intensity profile).

The ring's thickness will be equivalent to the diffraction-limited-spot size (of the input laser beam).

An Axicon also images a point source into a line along the optical axis and increases the Depth Of Focus (DOF). Each diffractive Axicon product is defined by its ring propagation angle.

Axicon for single ring shape

PN λ[nm] Element Size [mm] Ring Angle [deg] P2P(+) Ring Dia(+) [mm] for EFL=100mm Remarks
DA-004-I-Y-A 1064 25.4 8.14 14.231
DA-011-I-Y-A 1064 25.4 0.061 0.106
DA-003-I-Y-A 1064 25.4 0.3 0.524
DA-017-I-Y-A** 1064 34 1.52 2.653
DA-006-I-Y-A 1064 11 0.24 0.419
DA-032-I-Y-A 1064 25.4 3.6 6.285
DA-008-I-Y-A 1064 11 0.49 0.855
DA-009-I-Y-A 1064 11 0.98 1.71
DA-010-I-Y-A 1064 25.4 0.081 0.141
DA-033-I-Y-A 1064 25.4 7.2 12.583
DA-012-I-Y-A 1064 11 2 3.491
DA-031-I-Y-A 1064 25.4 1.8 3.142
DA-014-I-Y-A** 1064 34 0.19 0.332
DA-015-I-Y-A** 1064 34 0.38 0.663
DA-016-I-Y-A** 1064 34 0.76 1.326
DA-005-I-Y-A 1064 11 0.12 0.209
DA-018-I-Y-A 1064 11 1.72 3.002
DA-019-I-Y-A 1064 11 2.29 3.997
DA-020-I-Y-A 1064 11 0.057 0.099
DA-021-I-Y-A 1064 11 0.086 0.15
DA-029-I-Y-A 1064 11 1.39 2.426
DA-028-I-Y-A 1064 11 0.7 1.222
DA-027-I-Y-A 1064 11 0.35 0.611
DA-026-I-Y-A 1064 11 0.17 0.297
DA-025-I-Y-A 1064 11 0.35 0.611 High Efficiency
DA-024-I-Y-A 1064 11 0.17 0.297 High Efficiency
DA-023-I-Y-A 1064 11 0.24 0.419 High Efficiency
DA-013-I-Y-A 1064 34 0.19 0.332 High Efficiency
DA-007-I-Y-A 1064 11 0.12 0.209 High Efficiency
DA-002-I-Y-A 1064 7.25x7.25 30.85 55.183

Concentric Circles Pattern

Part Number λ (nm) number of rings Full Angle (Deg) Dimensions(mm) Material Coating
MC-006-I-Y-A 1064 2 1.83 11 Fused Silica AR V-Coating
MC-005-I-Y-A 1064 2 3.66 11 Fused Silica AR V-Coating
MC-017-1-Y-A 808 12 5.9 11 Fused Silica AR V-Coating
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