DE-R 289 Diffractive Optical Element
• Element Number: DE-R 289
• Current Product Revision: A
• Description: Cross – 15 @520
• Number of Spots on Line: 605
• Substrate Material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.2 mm
• Design Wavelengths: 520 nm
• Recommended Wavelength Range: 480 - 550 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
405 nm
21 mm
11.7°
450 nm
23 mm
13.0°
515 nm
26 mm
14.9°
532 nm
27 mm
15.4°
594 nm
30 mm
17.2°
635 nm
32 mm
18.4°
650 nm
33 mm
18.8°
730 nm
37 mm
21°
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
447
7.0%
488
1.5%
520
0.6%
532
0.7%
594
4.4%
638
9.0%
654
9.9%
687
14%
描述 [描述] Design Wavelengths: 520 nm