DE-R 382 Diffractive Optical Element
- Element Number: DE-R 382
- Current Product Revision: A
- Description: Cross – 30 @ 450
- Number of Spots on Line: 1003
- Size (Ø x Thickness): 8 x 0.63 mm
- Design Wavelengths: 450 nm
- Recommended Wavelength Range: 440-480 nm
- Minimum Recommended Beam Diameter: 2-3 mm
Within the recommended wavelength range, the zeroth order is not brighter than the rest of the cross. 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 A.
Pattern Geometry and Diffraction Angles
Wavelength
Patttern Size @ 100 mm
Distance
Pattern Angle
a
α
405 nm
47.9 mm
26.9°
450 nm
53.6 mm
30.0°
515 nm
62.0 mm
34.5°
532 nm
64.3 mm
35.6°
594 nm
72.7 mm
40.0°
635 nm
78.5 mm
42.8°
650 nm
80.6 mm
43.9°
684 nm
85.6 mm
46.3°
750 nm
95.6 mm
51.1°
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
402 nm
5.4%
447 nm
0.9%
515 nm
4.8%
531 nm
6.8%
640 nm
21.4%
658 nm
23.9%
684 nm
27.6%
749 nm
35.4%
描述 [描述] Design Wavelengths: 450 nm