DE-R 337 Diffractive Optical Element
• Element Number: DE-R 337
• Current Product Revision: A
• Description: 1 : 99 Dot Line
• Number of Dots: 99 Dots
• Substrate Material: Polymethyl Methacrylate (PMMA)
• Size (Ø x Thickness): 8 x 1 mm
• Design Wavelengths: 635 nm
• Recommended Wavelength Range: 600 - 700 nm
• Minimum Recommended Beam Diameter:0.5 mm
Within the recommended wavelength range, the zeroth order has a similar power than the off-axis beams of the dot line. Line width and line angles and the ratio between central spot and off-axis spots ('zero order intensity', see reverse page) will vary most with the wavelength.
Diffraction efficiencies given on this datasheet have been measured using elements of product revision A.
Line Geometry and Diffraction Angles
Wavelength
Pattern Size @ 100 mm Distance
Pattern Angles
a
b
α
β
450 nm
34 mm
0.35 mm
19.5°
0.20°
515 nm
40 mm
0.40 mm
22.4°
0.23°
532 nm
41 mm
0.42 mm
23.1°
0.24°
635 nm
49 mm
0.50 mm
27.7°
0.28°
650 nm
51 mm
0.52 mm
28.4°
0.29°
670 nm
52 mm
0.53 mm
29.3°
0.30°
730 nm
57 mm
0.58 mm
31.9°
0.33°
780 nm
62 mm
0.63 mm
34.2°
0.35°
808 nm
64 mm
0.65 mm
35.5°
0.36°
Setup
v> Laser diodes are the most common light source to be used with diffractive optical elements, but other laser light sources may also be used. The DOEs are best used with collimated or convergent laser sources. The microstructure surface should be oriented towards the laser. The 0-order spot is equivalent in size and shape to the original beam, but its power is attenuated.
Diffraction Zero Order Intensity:
Wavelength
0-Order
Intensity (TM)
0-Order
Intensity (TE)
Mean OA
intensity
516
10.2%
12.5%
532
7.2%
9.1%
0.72%
594
0.7%
1.6%
638
0.7%
0.8%
0.81%
654
1.1%
1.0%
687
3.1%
2.4%
751
8.2%
6.9%
0.76%
801
13.0%
11.2%
描述 [描述] Design Wavelengths: 635 nm