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

PNWavelength [nm]Beam Dia [mm]WD [mm]Spot SizeElement Size [mm]Image Shape
TH-042-U-Y-A3552.55050 um25.4Round
TH-245-U-Y-A355125045x10um25.4Rectangular
ST-202-U-Y-A355145050x6 um25.4Rectangular
ST-203-I-Y-A106465250x50 um25.4Square
ST-204-Q-Y-A53265230 x 30 um25.4Square
TH-241-W-Y-A26682001mm25.4Line
TH-235-U-Y-A3551270010mm27.94Line
ST-209-Q-Y-A5322104.76150x200um12.7Rectangular
ST-211-A-Y-A106001138125x200um27.94Rectangular
ST-215-U-Y-A3551447.86x34um25.4Rectangular
ST-216-U-Y-A3551447.86x38um25.4Rectangular
ST-217-U-Y-A3551447.86x42um25.4Rectangular
TH-234-A-Y-A106001495250um27.94Round
TH-233-A-Y-A106001263.50.25x2.5mm27.94Rectangular
TH-223-A-Y-A106002.456527.8x27.8mm15Square
TH-222-Q-Y-A5322.940200um12.7Line
TH-219-A-Y-A106001263.50.25x1.5mm27.94Rectangular
TH-217-U-Y-A3552100100x100um12.7Square
TH-009-A-Y-A106001063.5280x280 um27.94Square
TH-011-A-Y-A10600252503 mm38.1Round
TH-216-Q-Y-A5321272010x10mm25.4Square
TH-014-I-Y-A1064742.52190 um20Round
TH-017-I-Y-A10643920000635x5.3 mm50Rectangular
TH-018-I-Y-A10641320000635x635 mm38.1Square
TH-019-I-Y-A10643.5100210x210 um25.4Square
TH-209-U-Y-A3559x6200100 um25.4Round
TH-208-A-Y-A10600131505 mm27.94Line
TH-034-Q-Y-A5322.599.5100x100 um25.4Square
TH-035-Q-Y-A5322.599.590 um25.4Round
TH-036-Q-Y-A5323.5100200x200 um25.4Square
ST-201-A-Y-A1060016.5187.5360um38.1Round
TH-043-U-Y-A355849.815 um20Round
TH-205-A-Y-A1060041001.5mm25.4Round
TH-045-U-Y-A3551.6594170x170 um12.7Square
TH-046-U-Y-A3552.59561x61um12.7Square
TH-051-W-Y-A26654215 um25.4Round
TH-101-I-Y-A10643100150 um25.4Round
TH-102-I-Y-A10646100150 um25.4Round
TH-103-I-Y-A10649100010x10 mm25.4Square
TH-202-A-Y-A1060014.579.5370um20Round
TH-203-D-Y-A2940480200 um11Round
TH-204-Q-Y-A5323.5105200x200um25.4Square
ST-200-C-Y-A92501263.5260x260um27.94Square
TH-032-Q-Y-A53210.92002mm @FWHM25.4Round
TH-031-Q-Y-A532552.4100 um25.4Round
TH-005-C-Y-A92501262.9350 um27.94Round
TH-226-A-Y-A1060041003x3mm20Square
TH-231-I-Y-A106451000.2x0.6mm12.7Rectangular
TH-004-A-Y-A106001263.4390 um27.94Round
TH-003-A-Y-A106003.741650um12.7Line
TH-244-U-Y-A355125035x13um25.4Rectangular
TH-033-X-Y-A80062003 mm25.4Round
TH-012-H-Y-A1319743.2170 um20Round
TH-008-C-Y-A92501062.9260x260 um27.94Square
TH-232-X-Y-A107012150300x300um38.1Square
TH-007-C-Y-A92502512114.2X1.7 mm38.1Rectangular
TH-006-A-Y-A106002512515X1 mm38.1Rectangular
ST-208-X-Y-A10701475500x500um30Square
ST-205-I-Y-A10647100210x210um25.4Square
TH-044-1-Y-A337849.420 um20Round
TH-224-X-Y-A10701475.761x1mm38.1Square

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


TH-289-U-Y-A

355

4

0.11

180x180

25.4

Square

EFL=50mm

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 NoDOE dimensionsImage sizeWavelengthWorking distance
STO-TH-REC-8-2-INF-20mrad-10648 mm20 mrad1064 nmInfinite
STO-TH-REC-8-2-200-4x4-10648 mm4x4 mm1064 nm200 mm
STO-TH-REC-8-2.5-INF-20mrad-10648 mm20 mrad1064 nmInfinite
STO-TH-REC-8-2.5-200-4x4-10648 mm4x4 mm1064 nm200 mm
STO-TH-REC-8-3-INF-20mrad-10648 mm20 mrad1064 nmInfinite
STO-TH-REC-8-3-200-4x4-10648 mm4x4 mm1064 nm200 mm
STO-TH-REC-8-3.5-INF-20mrad-10648 mm20 mrad1064 nmInfinite
STO-TH-REC-8-3.5-200-4x4-10648 mm4x4 mm1064 nm200 mm
STO-TH-REC-10-4-INF-20mrad-10648 mm20 mrad1064 nmInfinite
STO-TH-REC-10-4-200-4x4-10648 mm4x4 mm1064 nm200 mm
STO-TH-REC-20-8-INF-2.9 mrad-106420 mm2.9 mrad1064 nmInfinite
STO-TH-REC-20-8-1700-5x5-106420 mm5x5 mm1064 nm1700 mm
STO-TH-REC-8-3.5-100-0.5x0.5-5328  mm0.5x0.5 mm532 nm100 mm
STO-TH-REC-8-3-200-4x4-5328  mm4x4 mm532 nm200 mm
STO-TH-REC-8-3.5-200-0.5x0.5-5328  mm0.5x0.5 mm532 nm200 mm
STO-TH-REC-8-3.5-200-1x1-5328  mm1x1 mm532 nm200 mm
STO-TH-REC-8-3.5-INF-5mrad-5328  mm5 mrad532 nmInfinite
STO-TH-REC-8-3.5-100-4.0x4.0-5328  mm4.0x4.0 mm532 nm100 mm
STO-TH-REC-8-3.5-200-4.0x4.0-5328  mm4.0x4.0 mm532 nm200 mm
STO-TH-REC-8-3.5-INF-40mrad-5328  mm40 mrad532 nmInfinite
STO-TH-REC-10-4.0--100-0.5x0.5-53210  mm0.5x0.5 mm532 nm100 mm
STO-TH-REC-10-4.0-INF-5mrad-53210  mm5 mrad532 nmInfinite
STO-TH-REC-10-4.0-100-6.0x6.0-53210  mm6.0x6.0 mm532 nm100 mm
STO-TH-REC-10-4.0--INF-59.9mrad-53210  mm59.9 mrad532 nmInfinite
STO-TH-REC-12-5.0-100-0.2x0.2-53212  mm0.2x0.2 mm532 nm100 mm
STO-TH-REC-12-5.0--INF-20mrad-53212  mm2 mrad532 nmInfinite
STO-TH-REC-12-5.0-100-0.5x0.5-53212  mm0.5x0.5 mm532 nm100 mm
STO-TH-REC-12-5.0-INF-5mrad-53212 mm5 mrad532 nmInfinite
STO-TH-REC-12-5.0-200-8.0x8.0-53212  mm8.0x8.0 mm532 nm200 mm
STO-TH-REC-12-5.0-INF-40mrad-53212  mm40.0 mrad532 nmInfinite
STO-TH-REC-20-8.0-200-12x12-53220  mm12x12 mm532 nm200 mm
STO-TH-REC-20-8.0-INF-99.7mrad-53220  mm99.7 mrad532 nmInfinite

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

Part NoDOE dimensionsImage sizeWavelengthWorking distance
STO-TH-RD-8-3.5-100-0.05-5328 mm0.05 mm532 nm100 mm
STO-TH-RD-8-3.5-INF-0.5mrad-5328 mm0.5 mrad532 nminfinite
STO-TH-RD-8-3.5-100-0.1-5328 mm0.1 mm532 nm100 mm
STO-TH-RD-8-3.5--INF-1mrad-5328 mm1 mrad532 nminfinite
STO-TH-RD-8-3.5-100-0.2-5328 mm0.2 mm532 nm100 mm
STO-TH-RD-8-3.5-INF-2mrad-5328 mm2 mrad532 nminfinite
STO-TH-RD-8-3.5-100-0.5-5328 mm0.5 mm532 nm100 mm
STO-TH-RD-8-3.5-INF-5mrad-5328 mm5 mrad532 nminfinite
STO-TH-RD-10-4.0-100-0.05-53210 mm0.05 mm532 nm100 mm
STO-TH-RD-10-4.0-INF-0.5mrad-53210 mm0.5 mrad532 nminfinite
STO-TH-RD-10-4.0-100-0.1-53210 mm0.1 mm532 nm100 mm
STO-TH-RD-10-4.0-INF-1mrad-53210 mm1 mrad532 nminfinite
STO-TH-RD-10-4.0-100-0.2-53210 mm0.2 mm532 nm100 mm
STO-TH-RD-10-4.0-INF-2mrad-53210 mm2 mrad532 nminfinite
STO-TH-RD-10-4.0-100-0.5-53210 mm0.5 mm532 nm100 mm
STO-TH-RD-10-4.0-INF-5mrad-53210 mm5 mrad532 nminfinite
STO-TH-RD-12-5.0-100-0.05-53212 mm0.05 mm532 nm100 mm
STO-TH-RD-12-5.0-INF-0.5mrad-53212 mm0.5 mrad532 nminfinite
STO-TH-RD-12-5.0-100-0.1-53212 mm0.1 mm532 nm100 mm
STO-TH-RD-12-5.0-INF-1mrad-53212 mm1 mrad532 nminfinite
STO-TH-RD-12-5.0-100-0.2-53212 mm0.2 mm532 nm100 mm
STO-TH-RD-12-5.0-INF-2mrad-53212 mm2 mrad532 nminfinite
STO-TH-RD-12-5.0-100-0.5-53212 mm0.5 mm532 nm100 mm
STO-TH-RD-12-5.0-INF-5mrad-53212 mm5 mrad532 nminfinite

2.2 Beam homogenizing tolerant to incident beam size and beam quality

Part NumberDOE receiving sizeWavelengthDiffraction angleDescription
STO-SFH-RD-12p5-25DEG-78512.5x12.5mm785nm25degree
STO-SFH-RD-12.5-25DEG-785-S12.5x12.5mm785nm25degreeCollimation of incident laser beam is not required
STO-SFH-REC-10-83p25x83p25mrad-53210x10mm532nm83.25x83.25
 mrad
Equivalent to 0.333x0.333mm @4mm working distance
STO-SFH-REC-50-4p3x11mrad-1064Φ50mm1064nm4.3x11mradEquivalent to 1.3x3.3mm @ 300mm working distance
STO-SFH-REC-50-2x5p3mrad-1064Φ50mm1064nm2x5.3mradEquivalent to 0.6x1.6mm @ 300 mm working distance
STO-SFH-REC-50-20x20mrad-1064Φ50mm1064nm20x20mradEquivalent to 6x6mm @ 300 mm working distance
STO-SFH-REC-25-10mrad-1064Φ25mm1064nm10mradEquivalent to 3x3mm @ 300 mm working distance
STO-SFH-RD-50-20mrad-1064Φ50mm1064nm20mradEquivalent to 6 mm in diameter round output spot @ 300 mm working distance
STO-SFH-REC-30-p5xp5mrad-106430 x 30mm1064nm0.5x0.5mradEquivalent to a 30x30micron output spot @60mm working distance
STO-SFH-REC-12-p15xp45mrad-35512 x 12mm355nm0.15x0.4mradEquivalent to a 20x60micron output spot @134mm working distance
STO-SFH-REC-25-p15xp45mrad-35525 x 25mm355nm0.15x0.45

mrad

Equivalent to a 20x60 micron output spot @134mm working distance
STO-SFH-REC-18-4mrad-35518 x 18mm355nm4x4 mrad
STO-SFH-REC-18-5p2mrad-35518 x 18mm355nm5.2x5.2mrad
STO-SFH-REC-12-p45x1p35mrad-106412 x 12mm1064nm
 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 NoDOE receiving sizeWavelengthDiffraction angle
STO-DF-RD-6-2-4736 x 6 mm473 nm2 deg
STO-DF-RD-6-3-5896 x 6 mm589 nm3 deg
STO-DF-RD-6-4-7856 x 6 mm785 nm4 deg
STO-DF-RD-6-4-8086 x 6 mm808 nm4 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 NumberShapePitch (um)Number of microlensDimensionROC(um)focal length (um)ROC error
STO-MLA-R14RoundΦ14

7~1512~36<+/-5%
STO-MLA-S14Square14x14

7~1512~36<+/-5%
STO-MLA-S25Square25x25248x1846.2x4.6~17~37<+/-5%
STO-MLA-S80Square80x80625x62550x50~58~120<+/-5%
STO-MLA-S96Square96x96105x21010x201440~ 3000<+/-5%
STO-MLA-S120Square120x12083x12610x202250~ 5000<+/-5%
STO-MLA-R150RoundΦ15032x324.8x4.8200~690450~1500<+/-5%
STO-MLA-S150Square150x15032x324.8x4.8200~690450~1500<+/-5%
STO-MLA-S150-170Square150x150148x14822.2x22.2138~170138~170<+/-5%
STO-MLA-R250RoundΦ25024x246x6547~1000<+/-5%
STO-MLA-S250Square250x25024x246x6547~1000<+/-5%
STO-MLA-H50-43.3Hexagon50x43.3

28.33
 (height15 micron)
~62<+/-5%
STO-MLA-R825-f13000Round82517 x1714 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.

PNλ[nm]Beam Diameter (mm)Image Shapeθf [deg]Image size*** [mm] for EFL=100mm
MR-003-I-Y-A10645.3Round0.4343
MR-004-I-Y-A10645.7Round0.440
MR-006-I-Y-A106410.2Round0.2323
MR-009-I-Y-A106411.3Round0.2121
MR-010-I-Y-A10642.3Round1.02102
MR-013-I-Y-A10644.2Round13.321332
MR-015-I-Y-A10644.2Round6.06606
MR-002-I-Y-A10644.5Round0.5252
MR-005-I-Y-A10647.9Round0.2929
MR-007-I-Y-A10646.8Round0.3434
MR-008-I-Y-A10649Round0.2626
MR-011-I-Y-A10643.4Round0.6969
MR-001-I-Y-A10648.5Round4.26426
MR-012-I-Y-A10648.4Round1.03103
MR-014-I-Y-A10644.2Round10.131013
MR-017-I-Y-A10648.4Round0.4747
MR-018-I-Y-A10646Round3.21321
RD-232-I-Y-A1064>1.5Round34.93490.4
RD-247-I-Y-A1064>6Round8.73873
RD-254-I-Y-A1064>4Round17.451745
MR-016-I-Y-A10647Round3.32332

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.

PNλ[nm]Sampled Energy [%]Sampled Angle [deg]Element Size [mm]
SA-010-I-Y-A10640.415.4312x12
SA-014-I-Y-A10640.415.4325.4
SA-022-I-Y-A10641.222.0725.4
SA-220-I-Y-A10640.510.2111
SA-020-I-Y-A106411.2727.94
SA-021-I-Y-A10641125.4
SA-219-I-Y-A10640.52.4425.4
SA-204-I-Y-A10640.52.0725.4
SA-206-I-Y-A106412.0725.4
SA-207-I-Y-A106421015
SA-218-I-Y-A10640.5125.4
SA-217-I-Y-A10640.52.8425.4
SA-216-I-Y-A10640.53.8125.4
SA-213-I-Y-A10640.59.2115
SA-215-I-Y-A10640.55.0925.4
SA-208-I-Y-A106425.0915
SA-211-I-Y-A1064120.7710x10
SA-209-I-Y-A10643.815.4310.7x10.7
SA-011-I-Y-A10641.615.4312x12
SA-012-I-Y-A10643.815.4312x12
SA-214-I-Y-A10640.57.649.8x9.8

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

PNλ[nm]Element Size [mm]Ring Angle [deg] P2P(+)Ring Dia(+) [mm] for EFL=100mmRemarks
DA-004-I-Y-A106425.48.1414.231
DA-011-I-Y-A106425.40.0610.106
DA-003-I-Y-A106425.40.30.524
DA-017-I-Y-A**1064341.522.653
DA-006-I-Y-A1064110.240.419
DA-032-I-Y-A106425.43.66.285
DA-008-I-Y-A1064110.490.855
DA-009-I-Y-A1064110.981.71
DA-010-I-Y-A106425.40.0810.141
DA-033-I-Y-A106425.47.212.583
DA-012-I-Y-A10641123.491
DA-031-I-Y-A106425.41.83.142
DA-014-I-Y-A**1064340.190.332
DA-015-I-Y-A**1064340.380.663
DA-016-I-Y-A**1064340.761.326
DA-005-I-Y-A1064110.120.209
DA-018-I-Y-A1064111.723.002
DA-019-I-Y-A1064112.293.997
DA-020-I-Y-A1064110.0570.099
DA-021-I-Y-A1064110.0860.15
DA-029-I-Y-A1064111.392.426
DA-028-I-Y-A1064110.71.222
DA-027-I-Y-A1064110.350.611
DA-026-I-Y-A1064110.170.297
DA-025-I-Y-A1064110.350.611High Efficiency
DA-024-I-Y-A1064110.170.297High Efficiency
DA-023-I-Y-A1064110.240.419High Efficiency
DA-013-I-Y-A1064340.190.332High Efficiency
DA-007-I-Y-A1064110.120.209High Efficiency
DA-002-I-Y-A10647.25x7.2530.8555.183

Concentric Circles Pattern

Part Numberλ (nm)number of ringsFull Angle (Deg)Dimensions(mm)MaterialCoating
MC-006-I-Y-A106421.8311Fused SilicaAR V-Coating
MC-005-I-Y-A106423.6611Fused SilicaAR V-Coating
MC-017-1-Y-A808125.911Fused SilicaAR V-Coating
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