DE-R 280 Diffractive Optical Element
• Element Number: DE-R 280
• Current Product Revision: B
• Description: Cross – 60 @ 635
• Number of Spots on Line: 1501
• Substrate Material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.15 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
76 mm
42°
515 nm
89 mm
48°
532 nm
92 mm
50°
635 nm
116 mm
60°
650 nm
119 mm
62°
730 nm
141 mm
70°
780 nm
156 mm
76°
808 nm
165 mm
79°
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
448
32%
532
9.5%
594
1.6%
638
0.18%
652
0.4%
688
1.3%
描述 [描述] Design Wavelengths: 635 nm