DE-R 286 Diffractive Optical Element
• Element Number: DE-R 286
• Current Product Revision: A
• Description: Quasi Continuous Line - 30
• Number of Spots on Line: 875
• Substrate Material: Polymethyl Methacrylate (PMMA)
• Size (Ø x Thickness): 8 x 1 mm
• Design Wavelengths: 660 nm
• Recommended Wavelength Range: 600-700 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 A.
Pattern Geometry and Diffraction Angles
Wavelength
Line Width @ 100 mm
Distance
Spot-to-spot spacing @
100 mm Distance
Pattern Angle
a
α
450 nm
36.49 mm
83.49 µm
20.68°
488 nm
39.68 mm
90.81 µm
22.45°
515 nm
41.97 mm
96.05 µm
23.70°
532 nm
43.42 mm
99.36 µm
24.50°
635 nm
52.36 mm
119.81 µm
29.34°
650 nm
53.68 mm
122.84 µm
30.05°
730 nm
60.86 mm
139.28 µm
33.85°
780 nm
65.46 mm
149.80 µm
36.25°
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
520
17.0%
19.4%
594
3.4%
4.1%
638
0.6%
0.9%
654
0.5%
0.4%
669
0.6%
0.3%
687
0.9%
0.5%
780
6.5%
4.9%
Line Power Profile
描述 [描述] Design Wavelengths: 660 nm