DE-R 384 Diffractive Optical Element
- Element Number: DE-R 384
- Current Product Revision: A
- Description: Random Pattern
- Number of Dots: 51978 Dots
- Substrate Material: Polycarbonate (PC)
- Size (Ø x Thickness): 8 x 0.63 mm
- Minimum Recommended Beam Diameter: 2-3 mm
- Design Wavelength: 640 nm
- Recommended Wavelength Range: 610-660 nm
When the DOE is used at a wavelength different from the design wavelength, the pattern will scale in size and geometrical distortions may occur (see section ‘Geometry and Diffraction Angles▼’). When the DOE is used at a wavelength within the recommended wavelength range, the element shows the lowest intensity in the central spot (see section ‘Zero Order Diffraction Intensity▼’ on reverse page).
Geometry and Diffraction Angles
If the DOE is used at laser wavelengths close to the design wavelength (Δλ < 50nm) the geometrical distortion is usually tolerable (see table below)
Wavelength
Pattern Size @ 100 mm Distance
Ratio corner-to-center
Pattern Angles
λ [nm]
wc [mm]
hc [mm]
wE [mm]
hE [mm]
Width
Height
θH [°]
θv [°]
450
83.2
64.8
79.3
59.4
95.4%
91.6%
45.2
35.9
515
97.8
75.4
94.4
70.7
96.5%
93.7%
52.1
41.3
532
101.9
78.3
98.7
73.9
96.9%
94.4%
54.0
42.8
640
130.4
97.6
130.4
97.6
100.0%
100.0%
66.2
52.0
658
135.7
101.0
136.6
102.3
100.7%
101.3%
68.3
53.6
684
143.7
106.1
146.4
109.6
101.9%
103.3%
71.4
55.9
750
166.6
119.8
176.1
131.9
105.7%
110.0%
79.6
61.9
800
186.8
131.1
205.8
154.1
110.2%
117.5%
86.1
66.5
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.
Zero Order Diffraction Intensity
Diffraction efficiencies given on this datasheet have been measured using elements of product revision A.
描述 [描述] Design Wavelength: 640 nm