DE-R 342 Diffractive Optical Element
• Element Number: DE-R 342
• Current Product Revision: A
• Description: Cross – 52 @ 515
• Number of Spots on Line: 2005
• Substrate Material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.2 mm
• Design Wavelengths: 515 nm
• Recommended Wavelength Range: 440-540 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
74 mm
40°
450 nm
83 mm
45°
488 nm
91 mm
49°
515 nm
98 mm
52°
532 nm
102 mm
54°
594 nm
117 mm
61°
635 nm
129 mm
65°
650 nm
133 mm
67°
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
402
9.7%
447
1.9%
488
0.6%
515
1.6%
532
2.7%
594
8.6%
638
14.3%
654
15.2%
描述 [描述] Design Wavelengths: 515 nm