T-GP2012L - VPH Transmission Grating, 840 nm DWL, 1200 Lines/mm, 30.3° AOI, Ø2"
Product Drawing
- Design Wavelength (DWL) and Spatial Frequency Options:
- 840 nm: 1200 Lines/mm
- 900 nm: 1000 Lines/mm
- 930 nm: 900, 1200, or 1500 Lines/mm
- 1030 nm: 800 or 1800 Lines/mm
- 1300 nm: 800 Lines/mm
- Design Wavelength 840 nm
-
Spatial Frequency 1200 lines/mm
- Angle of Incidence at the Design Wavelength 30.3°
-
Diffraction Efficiency
- 730 nm: S-Pol > 50%; P-Pol > 60%
840 nm: S-Pol > 80%; P-Pol > 80%
950 nm: S-Pol > 60%; P-Pol > 50%
- Broadband Antireflection Coating Performance at the Specified AOI (Per Surface) 650 - 1010 nm Ravg < 1.0%
-
Cover Plate Substrate or Equivalent
- Dimensions Ø50.8 mm x 6.0 mm
- High First-Order Diffraction Peak Efficiency (See Tables Below)
- Uniform Performance Over Broad Bandwidths (See Diffraction Efficiency Graphs Below)
- Extremely Low Scatter Between Orders (No Ghosting)
- Dichromated Gelatin (DCG) Film Between Two Glass Substrates
- Ideal for Spectroscopy, Optical Coherence Tomography (OCT), and Laser Pulse Compression
| T-GP2012L Specifications |
| Design Wavelength |
840 nm |
| Spatial Frequency |
1200 ± 2 lines/mm |
| Line Orientation |
±1° Off of Engraved Line |
| Angle of Incidence (AOI)a
|
30.3° ± 1° |
| Diffraction Efficiencyb
|
730 nm: S-Pol > 50%; P-Pol > 60%
840 nm: S-Pol > 80%; P-Pol > 80%
950 nm: S-Pol > 60%; P-Pol > 50% |
| BBAR Coatingc
|
650 - 1010 nm
Ravg < 1.0% |
| Transmitted Wavefront Error (RMS) |
<λ/4 at 632.8 nm |
| Grating Film |
Dichromated Gelatin |
| Cover-Plate Substrate |
N-BK7 or Equivalent |
| Surface Quality |
40-20 Scratch Dig |
| Dimensions (D x T) |
Ø50.8 mm x 6.0 mm |
| Clear Aperture |
>Ø46 mm |
| Diameter Tolerance |
+0.0 mm / -0.2 mm |
| Thickness Tolerance |
±0.2 mm |
