DE-R 283 Diffractive Optical Element
• Element Number: DE-R 283
• Current Product Revision: A
• Description: Quasi Continuous Line - 20
• Number of Spots on Line: 601
• Substrate Material: Polymethyl Methacrylate (PMMA)
• Size (Ø x Thickness): 8 x 1 mm
• Design Wavelengths: 633 nm
• Recommended Wavelength Range: 630-670 nm
• Minimum Recommended Beam Diameter: 0.5 mm
Within the recommended wavelength range, the zeroth order is not brighter than the rest of the line. Line width and line angle and the intensity in the undiffracted central spot ('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 C.
Pattern Geometry and Diffraction Angles
Wavelength
Line Width @ 100 mm
Distance
Spot-to-spot spacing @
100 mm Distance
Pattern Angle
a
α
450
24.8 mm
41.3 µm
14.2°
488
27.0 mm
44.9 µm
15.4°
515
28.5 mm
47.4 µm
16.2°
532
29.4 mm
49.0 µm
16.8°
635
35.3 mm
58.7 µm
20.0°
650
36.2 mm
60.2 µm
20.5°
730
40.8 mm
67.9 µm
23.1°
780
43.7 mm
72.7 µm
24.7°
808
45.4 mm
75.5 µm
25.6°
Setup
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
488
16.3%
18.4%
515
9.0%
10.1%
594
1.2%
1.2%
638
0.90%
0.8%
654
1.5%
1.2%
669
2.6%
1.9%
687
3.3%
2.7%
780
11.0%
9.5%
Line Power Profile
描述 [描述] Design Wavelengths: 633 nm