DE-R 397 Diffractive Optical Element
- Element Number: DE-R 397
- Current Product Revision: A
- Description: 11 x 10 Hexagonal Array
- Number of Dots: 105 Dots
- Substrate Material: Polycarbonate (PC)
- Size (Ø x Thickness): 8 x 0.63 mm
- Design Wavelengths: 660 nm
- Recommended Wavelength Range: 600-730 nm
- Minimum Recommended Beam Diameter: 2-3 mm
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. Within the recommended wavelength range, the zeroth order has a similar power than the off-axis beams of the dot matrix.
Diffraction efficiencies given on this datasheet have been measured using elements of product revision A.
Geometry and Diffraction Angles
Wavelength
Pattern Size @ 100 mm Distance
Pattern Angles
a
b
c
d
α
β
γ
δ
450 nm
42.6 mm
29.5 mm
3.4 mm
30.7 mm
24°
16.8°
1.9°
17.4°
520 nm
49.6 mm
34.3 mm
4.0 mm
35.7 mm
27.8°
19.5°
2.3°
20.3°
594 nm
57.1 mm
39.6 mm
4.6 mm
41.2 mm
31.9°
22.4°
2.6°
23.3°
640 nm
62.0 mm
43.0 mm
5.0 mm
44.7 mm
34.4°
24.2°
2.8°
25.2°
660 nm
64.1 mm
44.4 mm
5.1 mm
46.2 mm
35.5°
25.1°
2.9°
26.0°
684 nm
66.7 mm
46.2 mm
5.3 mm
48.1 mm
36.9°
26.0°
3.0°
27.0°
750 nm
74.0 mm
51.3 mm
5.9 mm
53.3 mm
40.6°
28.8°
3.3°
29.9°
800 nm
79.6 mm
55.2 mm
6.4 mm
57.4 mm
43.4°
30.9°
3.6°
32.0°
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 (min)
0-Order
Intensity TM (typ.)
0-Order
Intensity TM (max)
447 nm
47.5%
48.4%
49.1%
515 nm
19.6%
20.6%
21.8%
531 nm
15.0%
16.1%
17.1%
640 nm
0.4%
0.6%
0.8%
658 nm
0.1%
0.2%
0.3%
684 nm
0.3%
0.3%
0.5%
749 nm
2.9%
3.3%
3.7%
800 nm
6.0%
7.3%
8.2%
描述 [描述] Design Wavelengths: 660 nm