DE-R 246 Diffractive Optical Element
• Element Number: DE-R 246
• Current Product Revision: A
• Description: Cross – (10@633) with high contrast area
• Number of Spots on Line: 337
• Substrate Material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.2 mm
• Design Wavelengths: 633 nm
• Recommended Wavelength Range: 530-670 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
450 nm
12.5 mm
7.1°
515 nm
14.3 mm
8.2°
532 nm
14.7 mm
8.4°
635 nm
17.6 mm
10.1°
650 nm
18.0 mm
10.3°
730 nm
20 mm
11.6°
780 nm
22 mm
12.4°
808 nm
23 mm
12.8°
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
450
22.7%
488
11.2%
520
6.6%
594
0.8%
638
2.0%
654
2.7%
669
4.2%
687
5.7%
780
13.5%
描述 [描述] Design Wavelengths: 633 nm