Optical Filter

Optical Filter

Band Pass Filter Description: Transmission rate at certain wave band is high and the waveband light at its both sides is stopped. Cut-off filters of from near UV to medium infrared are available. Broadband filter and narrowband filter ( h / c 15%),

Band Pass Filters

Description:

  • Transmission rate at certain wave band is high and the waveband light at its both sides is stopped.
  • Cut-off filters of from near UV to medium infrared are available.
  • Broadband filter and narrowband filter (Δλ h / λ c<15%), pided so according to the central wavelength and bandwidth ratio.
  • Stop depth: OD2 – OD6
  • Peak transmittance and central wavelength λ c is related to semi-width Δλ h.
  • Central wavelength deviation
  • Substrate may be tailed to customers' request or be provided by customers.
  • Typical substrate: all kinds of optical glass, quartz glass, Ge, Si, etc.
  • Light transmission can be blocked effectively on extreme broad band by using color glass or double-sided coated glass.
  • Substrate size: Φ2 ~ Φ50 mm; thickness: 0.1 to 20 mm

Advantages:

  • High transmittance of the peak
  • Level pass band spectrum
  • Excellent stoppage within a wide waveband.
  • Superior uniformity
  • Coating: adopt plasma assistant plating and ion sputtering plating, and coating layers are firm, dense and do not absorb moisture.
  • Good stability of temperature and humidity.

1. ST-FIL Series Band Pass Filters

Diameter Tolerance +0/- 0.1mm
Thickness Tolerance ± 0.2mm
Surface Quality 80/50
CWL Tolerance ± 2nm
FWHM Tolerance ± 2nm
Blocking <10-4@X Ray~1200nm
Operating Temp Range - 400C~ + 600C
Part No. Dia(mm) Thickness(mm) CWL(nm) FWHM(nm) Tpeak(%) CA(mm)
ST-FIL12-214 12.7 3.3 214 10 >10% 7.8
ST-FIL12-254 12.7 3.3 254 10 >15% 7.8
ST-FIL12-280 12.7 3.3 280 10 >15% 7.8
ST-FIL12-340 12.7 8.2 340 10 >40% 7.8
ST-FIL12-405 12.7 4.5 405 10 >40% 7.8
ST-FIL12-450 12.7 4.5 450 10 >50% 7.8
ST-FIL12-510 12.7 4.5 510 10 >50% 7.8
ST-FIL12-546 12.7 4.5 546 10 >50% 7.8
ST-FIL12-578 12.7 4.5 578 10 >50% 7.8
ST-FIL12-630 12.7 4.5 630 10 >50% 7.8
ST-FIL16-214 16.0 3.3 214 10 >10% 11.1
ST-FIL16-254 16.0 3.3 254 10 >15% 11.1
ST-FIL16-280 16.0 3.3 280 10 >15% 11.1
ST-FIL16-340 16.0 8.2 340 10 >40% 11.1
ST-FIL16-405 16.0 4.5 405 10 >40% 11.1
ST-FIL16-450 16.0 4.5 450 10 >50% 11.1
ST-FIL16-510 16.0 4.5 510 10 >50% 11.1
ST-FIL16-546 16.0 4.5 546 10 >50% 11.1
ST-FIL16-578 16.0 4.5 578 10 >50% 11.1
ST-FIL16-630 16.0 4.5 630 10 >50% 11.1
ST-FIL25-214 25.4 3.3 214 10 >10% 20.5
ST-FIL25-254 25.4 3.3 254 10 >15% 20.5
ST-FIL25-280 25.4 3.3 280 10 >15% 20.5
ST-FIL25-340 25.4 8.2 340 10 >40% 20.5
ST-FIL25-405 25.4 4.5 405 10 >40% 20.5
ST-FIL25-450 25.4 4.5 450 10 >50% 20.5
ST-FIL25-510 25.4 4.5 510 10 >50% 20.5
ST-FIL25-546 25.4 4.5 546 10 >50% 20.5
ST-FIL25-578 25.4 4.5 578 10 >50% 20.5
ST-FIL25-630 25.4 4.5 630 10 >50% 20.5

2. STJ Series Narrow Band Filters

  • Coating technology: Ion-beam Assisted Deposition (IAD)
  • Coating range: 200-2300nm
  • Optical density: OD4@200-1200nm and OD3@1200-1700
  • Peak transmission: 15%-85%
  • Dimension: ø11.ø12.ø12.7.ø15.ø20.ø50 and etc.
  • Central wavelength: 340.365.405.450.492.546.578.630.670.690.750.780.808.850.905.940.1064. 1320.1550.1572
  • Minimum Size: Φ2mm or 2mm×2mm
  • Maximum Size: Φ50mm or 55×55mm
  • Surface Quality: 80/50 scratch/dig per Mil-O-13830A
  • Damage threshold: 20J/cm2, 10ns pulse
Center Wavelength (nm) FWHM(nm) Peak Transmission(%) Average Blocking
337.1±2 10±2 T>15% OD5@200-1200nm
355±2 10±2 T>15% OD5@200-1200nm
380±2 10±2 T>70% OD5@200-1200nm
410±2 10±2 T>70% OD4@200-1100nm
450±2 10±2 T>80% OD4@200-1100nm
460±2 10±2 T>80% OD4@200-1100nm
490±2 10±2 T>80% OD4@200-1100nm
510±2 10±2 T>80% OD4@200-1100nm
540±2 10±2 T>80% OD4@200-1100nm
655±2 10±2 T>80% OD4@200-1100nm
670±2 10±2 T>80% OD4@200-1100nm
690±2 10±2 T>80% OD4@200-1100nm
700±2 10±2 T>80% OD4@200-1100nm
750±2 10±2 T>80% OD4@200-1100nm
780±2 10±2 T>80% OD4@200-1100nm
808±2 10±2 T>80% OD4@200-1200nm
850±2 10±2 T>80% OD4@200-1200nm
905±2 7±4 T>85% OD4@200-1200nm
940±2 12±4 T>80% OD4@200-1200nm
1064±2 10-20±2 T>80% OD4@200-1200nm/OD3@1200-1700nm
1152±2 10±2 T>80% OD4@200-1200nm/OD3@1200-1700nm
1320±2 30±2 T>80% OD4@200-1200nm/OD3@1200-1700nm
1532±2 30±2 T>80% OD4@200-1200nm/OD3@1200-1700nm
1550±2 30±2 T>80% OD4@200-1850nm

Ordering Information:

STJ-FIL-xxxx-D or STJ-FIL-LxD

Where, xxxx is central wavelength, D is diameter, L is length and D is width.

3. Transmissions of Typical Bandpass Filters

A. Broadband bandpass filter

  • Band Pass: 485-650nm, Tavg>90%
  • Blocking: UV-450nm& 700-1100nm, Tavg<1%

B. Narrowband filter

  • CWL: 365nm
  • HW: 7nm
  • Tpeak >95%
  • Blocking: 270-340nm & 405-490nmv
  • OD>3

C. Infrared bandpass filter

  • CWL: 4.65μmv
  • HW: 0.2μmv
  • Tpeak>70%
  • Blocking: UV-4.2μm & 5.2-8.0μmv
  • OD>2

Band Stop Filters

Description:

  • Block spectrum transmission within a certain small waveband.
  • Central wavelength deviation
  • Stop depth:
  • Substrate may be tailed to customer's request or be provided by customers.
  • Typical substrate: all kinds of optical glass, quartz glass, etc.
  • Substrate size: Φ2 ~ Φ50 mm: thickness: 0.1 to 20 mm.

Advantages:

  • High pass band transmittance
  • Level pass band spectrum
  • High stop depth: OD2 – OD6
  • Superior uniformity
  • Coating: to adopt plasma assistant plating and ion sputtering plating, and coating layers are firm, dense and not absorbing moisture.
  • Good stability of temperature and humidity.

Typical Band Stop Filter:

  • CWL: 532nm
  • HW: 30nm
  • Tavg >90%
  • Band pass: 420-515nm & 550-700nmv
  • OD>6

Typical Filters

1.Band pass filter 500-600nm

  • HB495 colour glass + SP610 filter

2. Band pass filter 600-700nm

  • HB600 colour glass + SP700 filter

3. Band pass filter 700-800nm

  • HB700 colour glass + SP800 filter

4. Band pass filter 800-900nm

  • HWB800 colour glass + SP900 filter

Remark:

  • Colour glass is wide-band filter.
  • The thickness of glass is 2mm and the thickness of filter is 1.1mm. They are cemented with each other and thus the total thickness is about 3.1mm.