DE-R 244 Diffractive Optical Element
• Element Number: DE-R 244
• Current Product Revision: B
• Description: Matrix 13 x 13 Dots
• Number of Dots: 169 Dots
• Substrate material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.2 mm
• Design wavelengths: 635 nm
• Recommended wavelength range: 590-670 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
5.3 mm
3.7 mm
0.31 mm
3.7 mm
3.0°
2.1°
0.18°
2.1°
515 nm
6.0 mm
4.3 mm
0.35 mm
4.3 mm
3.5°
2.4°
0.20°
2.4°
532 nm
6.2 mm
4.4 mm
0.37 mm
4.4 mm
3.6°
2.5°
0.21°
2.5°
635 nm
7.4 mm
5.3 mm
0.44 mm
5.3 mm
4.3°
3.0°
0.25°
3.0°
650 nm
7.6 mm
5.4 mm
0.45 mm
5.4 mm
4.4°
3.1°
0.26°
3.1°
730 nm
8.5 mm
6.0 mm
0.50 mm
6.0 mm
4.9°
3.5°
0.29°
3.5°
780 nm
9.1 mm
6.5 mm
0.54 mm
6.5 mm
5.2°
3.7°
0.31°
3.7°
808 nm
9.5 mm
6.7 mm
0.56 mm
6.7 mm
5.4°
3.8°
0.32°
3.8°
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
35%
532
8.0%
594
0.8%
638
0.1%
654
0.3%
687
1.7%
801
9.8%
描述 [描述] Design wavelengths: 635 nm