DE-R 213 Diffractive Optical Element
• Element Number: DE-R 213
• Current Product Revision: B
• Description: 11 Lines (Square)
• Substrate material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.2 mm
• Design wavelengths: 635 nm
• Recommended wavelength range: 530-670 nm
• Minimum recommended beam diameter: 1-1.5 mm
Within the recommended wavelength range, the zeroth order central spot is not visible on the line. This Large-angle pattern is subject to geometrical distortion due to its symmetry properties, if the DOE is used at laser wavelengths significantly different (∆λ > 50nm) from the design wavelength. Pattern size and pattern angles 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 B.
Geometry and Diffraction Angles
Wavelength
Pattern Size @ 100 mm Distance
Pattern Angles
a
b
c
d
α
β
γ
δ
488 nm
57.0 mm
40.9 mm
4.0 mm
40.9 mm
31.8°
23.1°
2.3°
23.1°
543 nm
64.0 mm
45.8 mm
4.6 mm
45.8 mm
35.5°
25.8°
2.6°
25.8°
594 nm
70.7 mm
50.3 mm
5.0 mm
50.3 mm
38.9°
28.3°
2.8°
28.3°
635 nm
76.7 mm
54.4 mm
5.4 mm
54.4 mm
42.0°
30.4°
3.0°
30.4°
650 nm
79.8 mm
56.4 mm
5.6 mm
56.4 mm
43.5°
31.5°
3.1°
31.5°
730 nm
89.8 mm
62.9 mm
6.3 mm
62.9 mm
48.4°
34.9°
3.5°
34.9°
780 nm
97.4 mm
67.7 mm
6.8 mm
67.7 mm
51.9°
37.4°
3.7°
37.4°
808 nm
101.8 mm
70.4 mm
7.0 mm
70.4 mm
53.9°
38.8°
3.9°
38.8°
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
448
29%
515
8.9%
532
5.8%
594
0.3%
638
0.3%
654
0.7%
687
2.4%
751
7.2%
801
11.0%
MOUNTED VERSION
For testing or setups under laboratory conditions we offer a version mounted in 12.7 mm stainless steel frame for use with standard laboratory holders.
COLLIMATED / CONVERGI NG LASER
The laser can be collimated for long range use or converging for a fixed working distance. Please note that the size/thickness of each spot or line depends on the focusing of the laser.
描述 [描述] Design wavelengths: 635 nm