DE-R 241 Diffractive Optical Element
• Element Number: DE-R 241
• Current Product Revision: B
• Description: Matrix 21 x 21 Dots
• Number of Dots: 441 Dots
• Substrate material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.2 mm
• Design wavelengths: 635 nm
• Recommended wavelength range: 560-730 nm
• Minimum recommended beam diameter: 0.5-1 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 B.
Geometry and Diffraction Angles
Wavelength
Pattern Size @ 100 mm Distance
Pattern Angles
a
b
c
d
α
β
γ
δ
450 nm
8.4 mm
5.9 mm
0.30 mm
5.9 mm
4.8°
3.4°
0.17°
3.4°
515 nm
9.6 mm
6.8 mm
0.34 mm
6.8 mm
5.5°
3.9°
0.19°
3.9°
532 nm
9.9 mm
7.0 mm
0.35 mm
7.0 mm
5.7°
4.0°
0.20°
4.0°
635 nm
11.9 mm
8.4 mm
0.42 mm
8.4 mm
6.8°
4.8°
0.24°
4.8°
650 nm
12.2 mm
8.6 mm
0.43 mm
8.6 mm
7.0°
4.9°
0.25°
4.9°
730 nm
13.7 mm
9.6 mm
0.48 mm
9.6 mm
7.8°
5.5°
0.28°
5.5°
780 nm
14.6 mm
10.3 mm
0.52 mm
10.3 mm
8.4°
5.9°
0.30°
5.9°
808 nm
15.1 mm
10.7 mm
0.53 mm
10.7 mm
8.7°
6.1°
0.31°
6.1°
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
448
34%
532
8.0%
594
0.8%
638
0.1%
654
0.3%
687
1.8%
801
9.9%
描述 [描述] Design wavelengths: 635 nm