DE-R 263 Diffractive Optical Element
• Element Number: DE-R 263
• Current Product Revision: B
• Description: 1 : 5 Dot Line
• Number of Dots: 5 Dots
• Substrate Material: Polymethyl Methacrylate (PMMA)
• Size (Ø x Thickness): 8 x 1 mm
• Design Wavelengths: 635 nm
• Recommended Wavelength Range: 450-700 nm
• Minimum Recommended Beam Diameter:0.5 mm
Within the recommended wavelength range, the zeroth order has a similar power than the off-axis beams of the dot line. Line width and line angles and the ratio between central spot and off-axis spots ('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 B.
Line Geometry and Diffraction Angles
Wavelength
Pattern Size @ 100 mm Distance
Pattern Angles
a
b
α
β
488 nm
8.1 mm
2.0 mm
4.6°
1.15°
543 nm
9.0 mm
2.2 mm
5.1°
1.28°
594 nm
9.8 mm
2.5 mm
5.6°
1.40°
635 nm
10.5 mm
2.6 mm
6.0°
1.50°
650 nm
10.7 mm
2.7 mm
6.1°
1.54°
730 nm
12.1 mm
3.0 mm
6.9°
1.73°
780 nm
12.9 mm
3.2 mm
7.4°
1.84°
808 nm
13.4 mm
3.4 mm
7.6°
1.91°
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 VS Off-axis Order Intensity:
Wavelength
0-Order Intensity
Mean OA intensity
452
19%
12.8%
488
13%
14.0%
515
11%
532
10%
15.3%
594
11%
14.5%
638
15%
14.7%
654
16%
673
18%
687
19%
13.6%
Line Power Profile
描述 [描述] Design Wavelengths: 635 nm