DE-R 223 Diffractive Optical Element
• Element Number: DE-R 223
• Current Product Revision: A
• Description: Square Matrix 2 x 2 + 1 Dots
• Number of Dots: 5 Dots
• Substrate material: Polymethyl Methacrylate (PMMA)
• Size (Ø x Thickness): 8 x 1 mm
• Minimum recommended beam diameter: 0.1 mm
• Design wavelengths: 635 nm
• Recommended wavelength range: 635 nm (at 635 nm the intensity of the 0-order spot is 16.8% and of the offaxis spots 13.2%) and 405 nm (at 405 nm the intensity of the 0-order spot is 6.5% and of the off-axis spots10.8%)
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
α
β
405 nm
18 mm
12.7 mm
10.3°
7.3°
450 nm
20 mm
14.1 mm
11.4°
8.1°
515 nm
23 mm
16.1 mm
13.1°
9.2°
532 nm
24 mm
16.7 mm
13.5°
9.5°
635 nm
28 mm
19.9 mm
16.1°
11.4°
650 nm
29 mm
20 mm
16.5°
11.7°
730 nm
33 mm
23 mm
18.6°
13.1°
780 nm
35 mm
25 mm
19.9°
14.0°
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
405
6.5%
450
0.5%
488
0.5%
520
2.2%
594
9.5%
638
16.8%
654
18.9%
669
20.6%
描述 [描述] Design wavelengths: 635 nm