DE-R 299 Diffractive Optical Element
• Element Number: DE-R 299
• Current Product Revision: A
• Description: Cross – 75 @ 650
• Number of Spots on Line: 1501
• Substrate Material: : Polymethyl Methacrylate (PMMA)
• Size (Ø x Thickness): 8 x 1 mm
• Design Wavelengths: 635 nm
• Recommended Wavelength Range: 580-690 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
93 mm
50°
515 nm
110 mm
58°
532 nm
115 mm
60°
635 nm
148 mm
73°
650 nm
154 mm
75°
730 nm
187 mm
86°
780 nm
214 mm
94°
808 nm
232 mm
98°
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
27%
520
9.0%
532
6.1%
593
0.5%
638
0.4%
651
0.7%
687
1.6%
描述 [描述] Design Wavelengths: 635 nm