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Transmission gratings
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Product Details

Transmission Gratings

A transmission grating offers a basic simplicity for optical designs that can be beneficial in fixed grating applications such as spectrographs. The incident light is dispersed on the opposite side of the grating at a fixed angle. Transmission gratings are very forgiving for some types of grating alignment errors.

By necessity, a transmission grating requires relatively coarse groove spacings to maintain high efficiency. As the diffraction angles increase with the finer spacings, the refractive properties of the materials used limit the transmission at the higher wavelengths and performance drops off. The grating dispersion characteristics, however, lend themselves to compact systems utilizing small detector arrays. The gratings are also relatively polarization insensitive.


Transmission Gratings: Visible & NIR

This line of blazed transmission gratings was designed for optimum performance in the visible and NIR spectrum, offering different levels of dispersion. In most cases, the efficiency is comparable to that of reflection gratings typically used in the same region of the spectrum.  Zero order data is included in all performance curves for those interested in beam splitting applications.


Transmission Gratings: UV

UV Transmission Gratings are produced on fused silica substrates providing superior diffraction efficiencies as low as 235 nm. Zero order data is included in all performance curves for those interested in beam splitting applications.


Anti-reflective Coatings

Anti-reflective coatings can be applied to the non diffracting surface of our visible Transmission gratings which increase diffraction efficiencies by reducing first surface reflection losses. Our standard AR coatings are designed to increase efficiency of the grating in the 400-800nm range. Other anti-reflection coating spectral ranges are available, contact Optometrics to discuss your specific needs.


Transmission gratings

Transmission gratings


General specifications

Grooves 100-2400Lines/mm
Dimensional Tolerance ±0.5mm
Thickness Tolerance ±0.5mm
Blaze Angle Custom made
Type Transmission diffraction gratings
Material BK7/ Fused silica

Catalogue for transmission gratings

Item Groove(l/mm) Blaze WaveLeng(nm) Blaze Angle Dimensions(mm)
GT101 20 10000 5.7° 70*90
GT102 20 10000 5.7° 63*105
GT103 50 12800 18.7° 40*40
GT104 50 18000 26.7° 60*63
GT105 50 10600 15.4° 65*100
GT106 75 2000 4.3° 48*48
GT107 100 2500 7.2° 60*60
GT108 100 2750 7.9° 64*64
GT109 100 7000 20.5° 63*63
GT110 100 9000 26.7° 20*20
GT111 100 9800 29.3° 20*20
GT112 100 10600 32° 100*100
GT113 100 16000 53.1° 70*130
GT114 150 2000 8.6° 55*60
GT115 150 4000 17.5° 64*64
GT116 150 5300 23.4° 25*25
GT117 150 6000 26.7° 64*64
GT118 150 10000 48.6° 70*130
GT119 150 10600 52.7° 50*50
GT120 200 1550 8.9° 38*41
GT121 200 1800 10.4° 63*100
GT122 200 5000 30° 55*55
GT123 250 800 5.7° 64*64
GT124 300 500 4.3° 64*64
GT125 300 600 5.2° 100*100
GT126 300 640 5.5° 64*64
GT127 300 1000 8.6° 64*64
GT128 300 1500 13° 64*64
GT129 300 1900 16.6° 64*64
GT130 300 2000 17.5° 64*64
GT131 300 2400 21.1° 60*60
GT132 300 2500 22° 64*64
GT133 300 2750 24.4° 64*64
GT134 300 2800 24.8° 50*50
GT135 300 3000 28.7° 50*50
GT136 300 3500 32.7° 50*50
GT137 300 3800 34.8° 50*50
GT138 300 4000 35.9° 50*50
GT139 300 5000 46.6° 55*55
GT140 400 430 4.9° 35*50
GT141 400 500 5.7° 50*50
GT142 400 540 6.2° 48*50
GT143 400 1500 17.5° 64*64
GT144 400 2000 23.6° 64*64
GT145 450 430 5.6° 40*48
GT146 600 250 4.3° 64*64
GT147 600 360 6.2° 50*50
GT148 600 430 7.4° 40*40
GT149 600 500 8.6° 55*64
GT150 600 540 9.3° 85*85
GT151 600 600 10.4° 64*64
GT152 600 630 10.9° 17*44
GT153 600 640 11.1° 70*70
GT154 600 700 12.1° 64*64
GT155 600 720 12.5° 25*25
GT156 600 800 13.9° 20*45
GT157 600 1000 17.5° 40*65
GT158 600 1060 18.5° 40*65
GT159 600 1250 22° 64*64
GT160 600 1500 26.7° 64*64
GT161 600 1600 28.7° 64*64
GT162 600 2700 54.1° 20*90
GT163 1200 210 7.2° 64*64
GT164 1200 250 8.6° 64*64
GT165 1200 310 10.7° 64*64
GT166 1200 360 12.5° 55*55
GT167 1200 430 15° 53*62
GT168 1200 500 17.5° 102*102
GT169 1200 540 18.9° 70*70
GT170 1200 640 22.6° 100*102
GT171 1200 720 25.6° 50*60
GT172 1200 800 28.7° 50*100
GT173 1200 1000 36.9° 50*60
GT174 1200 1060 39.5° 100*105
GT175 1800 210 10.9° 64*64
GT176 1800 500 26.7° 50*50
GT177 1800 500 26.7° 30*70
GT178 1800 540 29.1° 30*70
GT179 1800 720 40.4° 30*70

Please contact us with your specific requirements.

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  • +86-199 0981 7122
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