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光柵概述

由大量等寬等間距的平行狹縫構成的光學器件稱為光柵(grating)。一般常用的光柵是在玻璃片上刻出大量平行刻痕制成,刻痕為不透光部分,兩刻痕之間的光滑部分可以透光,相當于一狹縫。精制的光柵,在1cm寬度內刻有幾千條乃至上萬條刻痕。這種利用透射光衍射的光柵稱為透射光柵,還有利用兩刻痕間的反射光衍射的光柵,如在鍍有金屬層的表面上刻出許多平行刻痕,兩刻痕間的光滑金屬面可以反射光,這種光柵稱為反射光柵。
宜興儀興光學元件

宜興儀興光學元件

品牌:宜興儀興
型號:
脈沖壓縮光柵

脈沖壓縮光柵

品牌:Spectrogon
型號:
凹面光柵

凹面光柵

品牌:Spectrogon
型號:
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宜興儀興光學元件

宜興儀興光學元件

spectrogon平面衍射光柵

spectrogon平面衍射光柵

  • 品牌: 瑞典Spectrogon
  • 貨號:
  • 產地:瑞典
  • spectrogon平面衍射光柵Plane Gratings高效率的衍射光柵訂購平面光柵時,請使用以下示例格式:P 1200 W×H×Thk 700-900nm(TM + TE)/ 2(-1)恒定偏差角度10°P為Plano和L為Littrow光柵(可選信息)1200是溝槽密度(溝槽頻率),單位為mm / mmW是與光柵槽平行的空白尺寸H是垂直于光柵凹槽的空白尺寸(mm)Thk是以毫米為單位的空白厚度700-900 nm是所需的優化范圍。 還可以指定具有峰值波長的特定波長或范圍平均(TM + TE)/ 2(-1)是光柵應該優化的所需偏振態和衍射級。 TM和TE也可以被指定恒定偏差角度10°是光柵應該優化的配置。 也可以指定恒定的入射角α°。溝槽密度:Spectrogon標準600個溝槽/ mm至3600個溝槽/ mm。 對于更低或更高的凹槽密度,請你與我們聯系。spectrogon平面衍射光柵Wavelength range from UV to approximately 2000 nmStandard sizes: 25 x 25 x 6 mm, 30 x 30 x 6 mm, 50 x 50 x 6 mm, , 50 x 50 x 10 mm, 58 x 58 x 10 mm, 64 x 64 x 10 mm, 90 x 90 x 16 mm, 110 x 110 x 16 mm, 100 x 140 x 20 mm, 120 x 140 x 20 mmStandard tolerances on W, H, Dia: ± 0.2 mm Thk ± 0.5 mm. CA > 90 % of each dimension.Other specifications available on request, contact our sales department!A Plane type of grating is the choice for high resolution spectroscopy and applications where low stray light levels are of high importance. With these gratings the spectral lines will be sharper, accurately on wavelength, and, in the case of absorption lines, deeper than with other gratings on the market.Extremely low stray lightThe gratings are holographically recorded with two highly collimated, clean and homogeneous beams, which give straight and equispaced grooves. The diffracted light from these gratings is free from ghost spectral lines. The randomly scattered light is as low as that from a good front surface aluminium mirror.Optimised efficiencyThe groove profile is symmetric sinusoidal, with a groove depth optimised for the spectral region of use. For obtaining the highest efficiency, these gratings are preferably used in configurations where only two diffracted orders (-1 and 0) are present, i.e. high groove frequency is preferred. In such case, the efficiency is comparable or better than for ruled blazed gratings. The groove depth variation across the grating surface is very small, also for the very highest groove frequencies. This means you can make full use of all the grating surface, for obtaining maximum throughput in your instrument.The combination of a flat grating surface, extremely straight and equally spaced grooves gives a flat diffracted wavefront making it possible to obtain maximum wavelength resolution.Accurate groove frequencyThe groove frequency of the gratings is accurate within ±0.2 grooves/mm of the nominal value. This means a reliable wavelength reading in your instrument.ApplicationsA plane grating is designed to meet the specifications for size, wavelength range, angle of incidence and angle of diffraction, but not for a specific focal length for the optical system. Therefore it is possible to use the same grating for different optical arrangements as long as the four previously mentioned parameters are the same.Spectroscopic InstrumentsA spectroscopic instrument consists generally of an entrance slit, a collimator, a dispersive element, focusing optics, and sometimes an exit slit. Radiation entering the entrance slit is collected by the collimator, generally a concave mirror.The dispersive element, in this case a grating, deviates the radiation in a direction which depends on the wavelength. The dispersed radiation is focused onto the image plane, where a spectrum (a series of monochromatic images of the entrance slit) is formed.MonochromatorsIn a monochromator there is an exit slit, which transmits a narrow portion of the spectrum. The entrance and exit slits are fixed, and the spectrum is scanned by rotating the grating. The grating thus works with a constant angular deviation between the incident and diffracted light. This is true for most types of monochromators, such as the Czerny-Turner, Ebert and Littrow types.Wavelength scaleFor a constant deviation mounting and with an angular deviation of, the grating equation can be written (assuming -1 order diffraction):sin(α + δ/2) = λ/(2dcos δ/2)We see that the wavelength transmitted by the monochromator is proportional to the sine of the rotation angle of the grating. Monochromators are often equipped with a special sine bar mechanism which facilitates the wavelength reading.Light throughputThe throughput of a grating based spectroscopic instrument depends on a number of factors, such as the radiance of the light source, the F-number of the optical system, the width and height of the entrance slit, the spectral bandwidth of the instrument and on the sensitivity of the detector.In a monochromator it is often more efficient to use a high frequency holographic grating, than a classically ruled grating of lower frequency, though the efficiency may be higher for the classically ruled grating. A grating with high frequency gives higher wavelength dispersion. For a given wavelength resolution, one is therefore able to use wider slits in the monochromator, which improves the light throughput.SpectrographsIn a spectrograph the grating is fixed and the detector simultaneously detects the different spectral components in the focal plane of the instrument. Modern instruments often utilize array detectors. Spectrographs with plane gratings are often made as modified Czerny-Turner configuration specially designed to give a flat focal plane.spectrogon平面衍射光柵

激光調諧光柵

激光調諧光柵

  • 品牌: 瑞典Spectrogon
  • 貨號:
  • 產地:瑞典
  • 激光調諧光柵 Plane Gratings for laser tuning用于激光調諧的高效率衍射光柵訂購光柵時,請使用以下示例格式,或從下面的光柵庫存列表中進行選擇。G 1100 W×H×Thk 1200-1600nm(TM / -1)恒定入射角75°G代表掠入射,P表示Plano,L表示Littrow光柵(可選信息)1100是溝槽密度(溝槽頻率),單位為mm / mmW是與光柵槽平行的空白尺寸H是垂直于光柵凹槽的空白尺寸(mm)Thk是以毫米為單位的空白厚度1200-1600納米是所需的優化范圍。還可以指定具有峰值波長的特定波長或范圍 (TM / -1)是光柵應該優化的期望的偏振態和衍射級。 TE和平均值(TM + TE)/ 2也可以被指定恒定入射角75°是光柵應該優化的配置。也可以指定恒定偏差θ°注意:顯示的絕對效率曲線僅代表所述幾何形狀和波長,并且可以根據使用幾何和測量技術而變化。激光調諧光柵 Art noDescriptionOptimisedfor (nm)Optimisedfor AOI (Deg)Min efficiency% (TM/-1)715.706.570G 0600 14x76x16 VIS (Z)6338229715.702.360G 0800 10x15x10 NIR15505792715.702.280G 0900 10x15x10 NIR15506092715.000036G 0900 10x15x10 1400 nm14008560715.702.270G 0900 13x29x10 NIR15507585715.702.300G 0900 15x15x10 1550 nm15507090715.702.290G 0900 15x15x10 NIR15507585715.702.340G 0900 15x20x10 NIR15507585715.705.020G 0900 30x30x6 NIR10657543715.702.390G 0930 10x15x10 NIR15507585715.702.380G 0955 10x15x10 NIR15007585715.702.230G 0990 10x15x10 NIR14006090715.702.930G 1050 10x15x10 NIR13107585715.704.820G 1200 15x60x10 NIR12408560715.705.700G 1200 20x20x6 NIR9807590715.703.290G 1200 20x90x16 NIR10508078715.704.040G 1350 15x60x10 NIR12408560715.706.230L 1600 10x15x6 NIR900Dev 0-10°90715.705.060G 1600 10x25x10 NIR7807585715.705.720G 1630 10x25x10 NIR8306690715.702.780G 1700 10x25x10 NIR7808550715.000038G 1800 10x20x6 NIR6338562715.705.500G 1800 10x25x6 NIR9757585715.704.950G 1800 20x70x15 VIS6508070715.703.900G 1800 20x90x16 VIS-NIR8007480715.703.650G 1800 20x90x16 VIS-NIR8008545715.700.790G 2400 10x25x10 VIS-NIR6337575715.705.100G 2400 10x30x6 VIS5508068715.705.430G 2400 12.5x62.5x10 VIS-NIR5758065715.702.880G 2400 15x60x10 VIS-NIR5908150715.704.960G 2400 20x70x15 VIS5008070715.703.660G 2400 20x90x16 VIS5148546715.704.970G 3000 20x70x15 VIS5008637715.702.760G 3000 20x90x16 VIS4708542715.704.980G 3600 20x70x15 VIS4008060Standard tolerances on W, H: ± 0.2 mm, Thk ± 0.5 mm. CA > 90 % of each dimension

脈沖壓縮光柵

脈沖壓縮光柵

  • 品牌: 瑞典Spectrogon
  • 貨號:
  • 產地:瑞典
  • 脈沖壓縮光柵Pulse Compression Gratings用于脈沖壓縮的高效率衍射光柵訂購脈沖壓縮光柵時,請使用以下示例格式,或從下面的PC光柵庫存列表中進行選擇。PC 1200 W×H×Thk 800nm(TM / -1)恒定偏差<10°?PC代表脈沖壓縮光柵?1200是溝槽密度(溝槽頻率),單位為mm / mm?W是與光柵槽平行的空白尺寸?H是垂直于光柵槽的空白尺寸?Thk是以毫米為單位的空白厚度?800納米是所需的優化波長。也可以指定峰值波長的范圍或范圍?(TM / -1)是光柵應該優化的偏振態和衍射級。 TE和平均值(TM + TE)/ 2也可以被指定?恒定偏差10°是光柵應優化的配置。恒定的入射角也可以被指定W,H標準公差:±0.2 mm,Thk±0.5 mm。 CA>每個維度的90%。標準尺寸:25 x 25 x 6毫米,30 x 30 x 6毫米,30 x 64 x 10毫米,30 x 110 x 16毫米,50 x 50 x 10毫米,50 x 110 x 16毫米,58 x 58 x 10 mm,64×64×10mm,90×90×16mm,110×110×16mm,100×140×20mm,120×140×20mm材料:λ> 750nm的金涂層(Au)標準。 ZKN7標準基板材料,Zerodur(Z)作為選項。注意:顯示的絕對效率曲線僅代表所述幾何形狀和波長,并且可以根據使用幾何和測量技術而變化。?Art noDescription, (Z) ZerodurOptimised for(nm) see curveDeviation(Deg) see curveMin Efficiency% (TM/-1)715.704.400PC 0300 50x50x10 NIR800828715.704.310PC 0600 25x25x6 NIR800829715.704.090PC 0600 25x50x10 NIR800829715.704.550PC 0600 30x30x6 NIR800829715.703.080PC 0600 30x30x6 1550 nm1550890715.705.560PC 0600 50x50x6 NIR800829715.701.890PC 0600 50x50x10 NIR16001690715.703.560PC 0600 50x50x10 1550 nm1550890715.705.510PC 0600 50x50x10 NIR24502090715.701.910PC 0600 50x110x16 NIR16001690715.706.430PC 0600 110x110x16 NIR24501090715.706.540PC 0800 100x140x20 NIR (Z)12501090715.706.530PC 0800 110x110x16 NIR (Z)12501090715.703.070PC 0900 30x30x6 NIR800875715.703.060PC 0900 30x30x6 NIR1032890715.704.600PC 0900 30x30x6 NIR1060890715.703.450PC 0900 30x30x6 1350 nm1350890715.703.130PC 0900 30x30x6 1550 nm1550890715.703.210PC 0900 30x64x10 1550 nm1550890715.703.440PC 0900 30x110x16 1350 nm1350890715.703.090PC 0900 30x110x16 1550 nm1550890715.706.550PC 0900 30x110x16 1950 nm19501090715.704.340PC 0900 50x50x10 NIR1047890715.703.550PC 0900 50x50x10 1550 nm1550890715.706.440PC 0900 120x140x20 1550 nm1550890715.704.140PC 1100 25x25x6 NIR1550890715.706.390PC 1100 30x75x16 NIR800888715.702.240PC 1100 30x110x16 NIR800888715.706.580PC 1100 30x110x16 NIR (Z)800888715.705.180PC 1100 50x50x10 NIR800888715.703.200PC 1100 50x50x10 NIR1550890715.703.500PC 1100 110x110x16 NIR800888715.704.160PC 1200 25x25x6 NIR800890715.702.200PC 1200 25x25x6 NIR1047890715.701.120PC 1200 30x30x6 NIR800890715.703.770PC 1200 30x30x6 NIR1047890715.702.940PC 1200 30x30x6 1550 nm1550890715.701.200PC 1200 30x64x10 NIR800890715.706.160PC 1200 30x64x10 NIR (Z)800890715.703.410PC 1200 30x64x10 1035 nm1035890715.705.810PC 1200 30x64x10 1550 nm1550890715.705.870PC 1200 30x75x16 NIR800890715.706.610PC 1200 30x75x16 NIR (Z)800890715.700.550PC 1200 30x110x16 NIR800890715.702.950PC 1200 30x110x16 NIR (Z)800890715.702.740PC 1200 30x110x16 NIR1550890715.700.640PC 1200 50x50x10 NIR800890715.705.050PC 1200 50x50x10 NIR (Z)800890715.704.690PC 1200 50x50x10 NIR1053890715.704.250PC 1200 50x50x10 NIR1250890715.702.150PC 1200 58x58x10 NIR800890715.703.930PC 1200 58x58x10 NIR (Z)800890715.703.700PC 1200 58x58x10 NIR1550890715.703.880PC 1200 58x58x10 NIR (Z)1550890715.705.170PC 1200 64x30x10 NIR (Z)800890715.700.620PC 1200 64x64x10 NIR800890715.705.950PC 1200 64x64x10 NIR1053890715.701.820PC 1200 50x80x16 NIR8001490715.700.630PC 1200 50x110x16 NIR800890715.701.320PC 1200 50x110x16 NIR8001490715.702.910PC 1200 50x110x16 NIR (Z)800890715.705.600PC 1200 50x110x16 NIR1047890715.705.030PC 1200 50x140x20 NIR800890715.703.710PC 1200 58x140x20 NIR1550890715.703.890PC 1200 58x140x20 NIR (Z)1550890715.704.460PC 1200 60x90x16 NIR8001490715.700.460PC 1200 90x90x16 NIR800890715.703.280PC 1200 100x140x20 NIR800890715.705.770PC 1200 110x50x16 NIR (Z)800890715.700.580PC 1200 110x110x16 NIR800890715.703.960PC 1200 110x110x16 NIR (Z)800890715.706.450PC 1200 110x110x16 NIR1053890715.701.220PC 1200 120x140x20 NIR800890715.704.670PC 1200 120x140x20 NIR (Z)800890715.705.400PC 1200 120x140x20 NIR1053890715.704.680PC 1250 30x64x10 NIR1040890715.703.190PC 1400 25x25x6 NIR800890715.701.360PC 1400 30x30x6 NIR800890715.702.620PC 1400 30x30x6 NIR8001290715.705.900PC 1400 30x75x16 NIR8001590715.700.720PC 1400 30x110x16 NIR8001590715.701.760PC 1400 30x110x16 NIR800890715.706.830PC 1400 30x110x16 NIR (Z)800890715.702.840PC 1400 50x50x10 NIR800890715.703.990PC 1400 50x50x10 NIR (Z)800890715.704.510PC 1400 50x110x16 NIR800890715.704.010PC 1400 50x110x16 NIR (Z)800890715.704.610PC 1400 60x120x20 NIR8002190715.703.260PC 1400 64x64x10 NIR800890715.703.620PC 1400 90x90x16 NIR800890715.703.240PC 1400 110x110x16 NIR8001590715.704.990PC 1400 110x110x16 NIR (Z)8001090715.706.370PC 1400 110x110x16 NIR (Z)8002190715.704.080PC 1400 100x140x20 NIR8001790715.704.190PC 1400 120x140x20 NIR8001290715.704.660PC 1400 120x140x20 NIR (Z)800890715.705.730PC 1480 25x25x6 NIR1053890715.704.030PC 1480 50x50x10 NIR7652089715.706.150PC 1480 58x58x10 NIR800890715.705.780PC 1480 50x110x16 NIR1053890715.703.750PC 1480 60x140x20 NIR1060890715.705.740PC 1480 110x110x16 NIR800890715.705.750PC 1480 120x140x20 NIR800890715.706.110PC 1480 120x140x20 NIR (Z)800890715.705.990PC 1480 140x120x20 NIR8001890715.706.780PC 1480 140x120x20 NIR (Z)800890715.703.640PC 1500 25x25x6 NIR800890715.702.590PC 1500 30x30x6 NIR8005590715.704.050PC 1500 30x30x6 NIR1030890715.703.860PC 1500 30x64x10 NIR800890715.706.730PC 1500 30x64x10 NIR (Z)800AOI 53 Dev 3090715.706.220PC 1500 30x64x10 NIR10301090715.705.070PC 1500 30x75x16 1030 nm1030890715.701.470PC 1500 30x110x16 800 nm800890715.702.990PC 1500 30x110x16 800 nm8002690715.703.110PC 1500 30x110x16 1030 nm1030890715.703.100PC 1500 30x110x16 1030 nm (Z)1030890715.704.120PC 1500 50x50x10 NIR8001390715.703.980PC 1500 50x50x10 NIR (Z)8001390715.706.400PC 1500 50x50x10 NIR (Z)800AOI 53 Dev 3090715.701.380PC 1500 50x110x16 800 nm800890715.703.510PC 1500 50x110x16 NIR (Z)800890715.703.000PC 1500 50x110x16 800 nm8002690715.703.520PC 1500 50x110x16 NIR (Z)800AOI 53 Dev 3090715.702.470PC 1500 50x140x20 NIR8001390715.706.670PC 1500 50x140x20 NIR (Z)8001390715.704.350PC 1500 58x58x10 NIR8001490715.703.920PC 1500 58x58x10 NIR (Z)8001390715.704.800PC 1500 64x30x10 NIR (Z)800890715.701.750PC 1500 64x64x10 NIR800890715.705.230PC 1500 64x64x10 NIR (Z)800890715.704.520PC 1500 80x50x16 NIR800890715.705.710PC 1500 80x50x16 NIR (Z)800890715.703.780PC 1500 90x90x16 NIR8001490715.703.610PC 1500 100x140x20 NIR800890715.702.040PC 1500 100x140x20 NIR8003390715.706.290PC 1500 100x140x20 NIR (Z)800890715.706.630PC 1500 100x140x20 NIR (Z)800AOI 53 Dev 3090715.703.420PC 1500 110x50x16 NIR800890715.704.200PC 1500 110x110x16 NIR800890715.704.850PC 1500 110x110x16 NIR (Z)800890715.706.380PC 1500 110x110x16 NIR (Z)780AOI 53 Dev 3090715.705.480PC 1500 110x110x16 NIR800AOI 53 Dev 3090715.701.660PC 1500 120x140x20 NIR800890715.703.950PC 1500 120x140x20 NIR (Z)8001390715.705.620PC 1500 120x140x20 NIR800AOI 53 Dev 3090715.704.430PC 1600 25x25x6 NIR800890715.705.220PC 1600 30x30x6 NIR800890715.704.150PC 1600 30x64x10 NIR800890715.704.870PC 1600 30x75x16 NIR8001590715.700.350PC 1600 30x110x16 NIR8001590715.704.440PC 1600 50x50x10 NIR7502090715.704.880PC 1600 50x110x16 NIR (Z)8001590715.705.440PC 1600 64x64x10 NIR10641090715.705.110PC 1600 110x110x16 NIR (Z)800890715.704.320PC 1600 110x110x16 NIR10531090715.704.420PC 1600 120x140x20 NIR800890715.704.560PC 1700 25x25x6 NIR800890715.706.240PC 1700 30x30x6 NIR800890715.702.400PC 1700 30x30x6 NIR1053890715.702.960PC 1700 30x64x10 NIR8003090715.702.970PC 1700 30x64x10 VIS6333079715.705.190PC 1700 30x64x10 NIR1053890715.706.680PC 1700 30x110x16 NIR (Z)1053890715.703.670PC 1700 50x50x10 NIR1040890715.702.650PC 1700 50x110x16 NIR1040890715.705.960PC 1700 58x140x20 NIR (Z)800890715.701.680PC 1700 64x64x10 800 nm800890715.703.230PC 1700 64x64x10 1053 nm1053890715.705.420PC 1700 120x140x20 NIR1053890715.705.680PC 1740 30x30x6 NIR1053890715.705.910PC 1740 30x64x10 NIR (Z)1053890715.705.690PC 1740 30x110x16 NIR1053890715.705.800PC 1740 50x50x10 NIR1053890715.706.590PC 1740 50x50x10 NIR (Z)1060890715.706.020PC 1740 64x30x10 NIR (Z)1053890715.701.880PC 1740 64x64x10 NIR1053890715.705.920PC 1740 64x64x10 NIR (Z)1053890715.704.570PC 1740 50x110x16 NIR (Z)1053890715.703.760PC 1740 58x140x20 NIR1060890715.703.940PC 1740 58x140x20 NIR (Z)1053890715.705.830PC 1740 110x110x16 NIR1057890715.705.840PC 1740 100x140x20 NIR1057890715.704.070PC 1740 120x140x20 NIR (Z)10541490715.704.100PC 1740 120x140x20 NIR10541490715.705.570PC 1800 10x20x6 NIR1040885715.702.660PC 1800 12.5x12.5x6 NIR780890715.701.070PC 1800 15x15x6 NIR800890715.705.540PC 1800 15x30x6 NIR800890715.704.130PC 1800 25x25x6 NIR800890715.705.590PC 1800 25x25x6 NIR1053882715.701.140PC 1800 30x30x6 NIR800890715.702.510PC 1800 30x30x6 NIR1030890715.704.180PC 1800 30x30x6 NIR1047890715.703.690PC 1800 30x64x10 NIR800890715.702.520PC 1800 30x64x10 1030 nm1030890715.704.810PC 1800 30x64x10 1047 nm1047890715.703.120PC 1800 30x64x10 1060 nm1060885715.703.830PC 1800 30x75x16 800 nm8001490715.704.060PC 1800 30x75x16 1030 nm1030890715.700.450PC 1800 30x110x16 NIR800890715.705.250PC 1800 30x110x16 NIR (Z)800890715.703.010PC 1800 30x110x16 800 nm8001790715.702.530PC 1800 30x110x16 NIR1030890715.704.170PC 1800 30x110x16 NIR1047890715.700.800PC 1800 50x50x10 NIR800890715.704.110PC 1800 50x50x10 NIR (Z)800890715.704.280PC 1800 50x50x10 NIR1030890715.704.490PC 1800 50x50x10 NIR1064885715.700.600PC 1800 50x110x16 NIR800890715.703.570PC 1800 50x110x16 NIR (Z)8001690715.703.020PC 1800 50x110x16 800 nm8001790715.704.290PC 1800 50x110x16 NIR1030890715.704.370PC 1800 50x110x16 NIR1053882715.705.160PC 1800 50x140x20 NIR800890715.704.540PC 1800 50x140x20 NIR1030890715.702.500PC 1800 58x58x10 NIR800890715.706.170PC 1800 64x30x10 NIR8001090715.704.020PC 1800 64x30x10 NIR (Z)800890715.700.560PC 1800 64x64x10 NIR800890715.704.380PC 1800 64x64x10 NIR1053882715.704.940PC 1800 90x90x16 NIR800890715.704.220PC 1800 100x140x20 NIR800890715.700.590PC 1800 110x110x16 NIR800890715.704.860PC 1800 110x110x16 NIR (Z)800890715.704.410PC 1800 110x110x16 NIR1053882715.701.150PC 1800 120x140x20 NIR800890715.703.820PC 1800 120x140x20 NIR (Z)800890715.706.350PC 2000 25x25x6 VIS-NIR600883715.703.270PC 2000 25x25x6 NIR800890715.701.920PC 2000 30x30x6 NIR800890715.701.040PC 2000 30x30x6 800 nm800890715.700.470PC 2000 30x64x10 NIR800890715.704.890PC 2000 30x75x16 VIS530883715.701.580PC 2000 30x75x16 800 nm800890715.700.570PC 2000 30x110x16 NIR8001590715.700.920PC 2000 30x110x16 NIR800890715.700.820PC 2000 50x50x10 NIR800890715.701.330PC 2000 50x110x16 NIR800890715.703.800PC 2000 50x110x16 NIR (Z)800890715.703.630PC 2000 50x110x16 NIR (Z)8002388715.702.600PC 2000 58x58x10 NIR950890715.700.830PC 2000 64x64x10 NIR800890715.704.230PC 2000 100x140x20 NIR800890715.704.270PC 2000 110x110x16 NIR800890715.701.710PC 2000 120x140x20 NIR800890715.705.280PC 2100 25x25x6 NIR800890715.703.480PC 2100 30x30x6 NIR800890715.703.040PC 2100 30x64x10 NIR800890715.701.650PC 2100 30x110x16 NIR800890715.702.260PC 2100 50x50x10 NIR800890715.702.250PC 2100 50x110x16 NIR800890715.704.360PC 2200 25x25x6 NIR800890715.701.970PC 2200 30x30x6 NIR800890715.705.120PC 2200 30x64x10 NIR800890715.701.230PC 2200 30x110x16 NIR800890715.705.790PC 2200 30x110x16 NIR (Z)8001588715.703.360PC 2200 50x50x10 NIR7651690715.705.820PC 2200 50x50x10 NIR (Z)7651690715.701.630PC 2200 50x50x10 NIR800890715.703.370PC 2200 50x110x16 NIR7651690715.701.530PC 2200 50x110x16 NIR800890715.703.810PC 2200 50x110x16 NIR (Z)800890715.703.580PC 2200 50x110x16 NIR (Z)8001588715.703.350PC 2200 100x140x20 NIR800890715.703.540PC 2200 100x140x20 NIR8001390715.702.560PC 2200 100x140x20 NIR8002185715.700.650PC 2200 110x110x16 NIR800890715.706.360PC 2200 110x110x16 NIR (Z)800890715.703.910PC 2200 120x140x20 NIR8001390715.704.580PC 2300 25x25x6 NIR800888715.702.850PC 2300 30x30x6 NIR800888715.702.190PC 2300 30x64x10 NIR800888715.701.450PC 2300 30x110x16 NIR8001588715.702.800PC 2300 50x50x10 NIR800888715.702.690PC 2400 12.5x12.5x6 NIR780887715.701.990PC 2400 30x30x6 NIR800887715.701.980PC 2400 30x64x10 NIR800887715.701.350PC 2400 30x110x16 NIR800887715.701.340PC 2400 50x50x10 NIR800887715.705.270PC 2400 50x110x16 VIS500885715.704.930PC 3000 30x30x6 UV400885

凹面光柵

凹面光柵

  • 品牌: 瑞典Spectrogon
  • 貨號:
  • 產地:瑞典
  • ?凹面光柵Concave Gratings Rowland Type標準產品:訂購凹面光柵時,請使用以下示例格式:C 1800→63.5×Thk12.5 190-400(TM + TE)/ 2(-1)偏差角度10°,RoC -750毫米C代表凹面光柵1800是溝槽密度(溝槽頻率),單位為mm / mmW是與光柵槽平行的空白尺寸H是垂直于光柵凹槽的空白尺寸(mm)是以毫米為單位的直徑Thk是以mm為單位的空白中心厚度190-400 nm是所需的優化范圍。還可以指定具有峰值波長的特定波長或范圍(TM + TE)/ 2(-1)是光柵應該優化的所需偏振態和衍射級。 TE或TM也可以被指定恒定偏差角度10°(|α° - β°|)是光柵應該優化的配置。恒定入射角α°也可以被指定 W,H,Dia的標準公差:±0.2 mm Thk±0.5 mm。 CA>空白直徑的90%凹面光柵目前備有凹面光柵基底:Size [mm]Thk [mm]RoC [mm]Material40 x 457-225Pyrex50 x 507-225Pyrexφ50.86-100BK7φ63.512.5-400Pyrexφ63.512.5-750Fused Silicaφ63.512.5-999QuartzConcave Gratings Rowland TypeThis type of grating is the holographic counterpart of the classically ruled concave grating, invented by Rowland in the 19th century. The Rowland grating has straight grooves which are equally spaced along a chord of the concave surface.Rowland circleThese gratings are preferably used in mountings based on the Rowland circle, i.e. a circle with a diameter equal to the radius of curvature of the grating. If the entrance slit is located on the Rowland circle, then the spectral focus will also be on this circle.If R is the radius of curvature, and α and β are the angles of incidence and diffraction, respectively, thenLA = RcosαLB = Rcosβwhere LA and LB are the distances from grating centre to the entrance slit and spectral focus.Good resolutionThe aberrations (except astigmatism) are small for all points on the Rowland circle, making the gratings useful for wide spectral ranges.Since all diffracted orders are focused on the Rowland circle, it is possible to make measurements on different orders simultaneously.Extremely low stray lightSpectrogon's Rowland holographic gratings are fabricated with the same proprietary technique as our low stray light plane gratings.Good efficiencyThe sinusoidal groove profile of holographic gratings gives a better overall performance than a triangular "blazed" profile. Though a blazed concave grating may have higher efficiency at the grating centre, other points on the surface are "off blaze", giving lower efficiency.Accurate groove frequencyThe groove frequency (at the grating centre) is accurate within ±0.2 grooves/mm of the nominal value. The gratings are holographically exposed using optically flat wavefronts, ensuring straight and equispaced grooves.spectrogon凹面光柵

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