DE-R 247 Diffractive Optical Element
• Element Number: DE-R 247
• Current Product Revision: E
• Description: Cross – 25 @ 645
• Number of Spots on Line: 1051
• Substrate Material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.2 mm
• Design Wavelengths: 645 nm
• Recommended Wavelength Range: 600-800 nm
• Minimum Recommended Beam Diameter: 2.5-3 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
27 mm
17.4°
515 nm
35 mm
19.9°
532 nm
36 mm
21°
635 nm
44 mm
25°
650 nm
45 mm
25°
730 nm
51 mm
28°
780 nm
54 mm
30°
808 nm
56 mm
32°
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
515
27%
532
23%
594
8.7%
638
3.4%
653
2.2%
684
1.1%
751
1.5%
801
3.6%
描述 [描述] Design Wavelengths: 645 nm