DE-R 220 Diffractive Optical Element
• Element Number: DE-R 220
• Current Product Revision: A
• Description: 1 : 16 Dot Circle
• Number of Dots: 16 + 1 Dots
• Substrate material: Polycarbonate (PC)
• Size (Ø x Thickness): 8 x 1.2 mm
• Design wavelengths: 515 nm
• Recommended wavelength range: 480-532 nm
• Minimum recommended beam diameter: 0.5-1.0 mm
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. At the optimum wavelength given on this datasheet, the element shows the lowest intensity in the central spot.
Diffraction efficiencies given on this datasheet have been measured using elements of product revision A.
Geometry and Diffraction Angles
Wavelength
Pattern Size @ 100 mm Distance
Pattern Angles
a
b
α
β
450 nm
70 mm
13.8 mm
39°
7.9°
488 nm
77 mm
15.1 mm
42°
8.6°
520 nm
83 mm
16.3 mm
45°
9.3°
532 nm
85 mm
16.7 mm
46°
9.6°
594 nm
97 mm
19.1 mm
52°
10.9°
635 nm
106 mm
20.8 mm
56°
11.9°
650 nm
109 mm
21.4 mm
57°
12.2°
730 nm
127 mm
25.0 mm
65°
14.3°
Step
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
451
2.6%
488
0.1%
515
0.4%
532
1.3%
594
7.0%
638
12.9%
MOUNTED VERSION
For testing or setups under laboratory conditions we offer a version mounted in 12.7 mm stainless steel frame for use with standard laboratory holders.
COLLIMATED / CONVERGI NG LASER
The laser can be collimated for long range use or converging for a fixed working distance. Please note that the size/thickness of each spot or line depends on the focusing of the laser.
描述 [描述] Design wavelengths: 515 nm