DOE_Viewfinder (Viewfinder)
LD Collimators & Diffractive Optics: Pattern-Generator
Diffractive Optical Element (DOE)
Description:
LD Collimators & Diffractive Optics: Pattern-Generator
A diffractive pattern generator is a device or system that uses the principles of diffractive optics to create specific light patterns. Diffractive optics involves the manipulation of light through structures with dimensions comparable to the wavelength of light, typically using interference and diffraction effects.
This article refers to: DOE_Viewfinder (Viewfinder) (LD Collimators & Diffractive Optics: Pattern-Generator ) - Viewfinder
| DOE Item # | Description | Design Wavelength | Pattern Size @ 100 mm Distance (@ Design Wavelength) | Pattern Angles (@ Design Wavelength) | Optimum Wavelength Range | Image |
| FDE-R215 | Viewfinder | 645 nm | Width: 27 mm Height: 17.7 mm Diagonal: 32 mm |
Width: 15.5° Height: 10.1° Diagonal: 18.2° |
570 – 750 nm | 
|
| FDE-R234 | Viewfinder (Lines Square) | 633 nm* | Width: 61 mm Height: 61 mm Diagonal: 86 mm |
Width: 34° Height: 34° Diagonal: 47° |
590 – 730 nm | 
|
| FDE-R260 | Viewfinder (Circle + Cross) | 645 nm | Width Cross: 37 mm Circle Ø: 18.3 mm |
Width Cross: 21° Circle Ø: 10.5° |
570 – 750 nm | 
|
| FDE-R261 | Viewfinder (Dot Circle + Cross) | 635 nm | Width Cross: 11 mm Circle Ø: 8.8 mm Dot Spacing: 1.1 mm |
Width Cross: 6.3° Circle Ø: 5° Angle betw. Dots: 0.63° |
570 – 750 nm | 
|
| FDE-R262 | Viewfinder (Dot Square) | 532 nm | Width: 12.3 mm Height: 12.3 mm Diagonal: 17.4 mm Dot Spacing: 0.5 mm |
Width: 7.0° Height: 7.0° Diagonal: 10.0° Angle betw. Dots: 0.3° |
480 – 670 nm | 
|
| FDE-R288 | Viewfinder | 650 nm | Width: 83.0 mm Height: 53.7 mm Diagonal: 98.9 mm |
Width: 43.7° Height: 27.9° Diagonal: 52.6° |
590 – 730 nm |
|
| FDE-R345 | Viewfinder (Circle + Cross) | 520 nm | Width Cross: 49.9 mm Circle Ø: 24.6 mm |
Width Cross: 28.0° Circle Ø: 14.0° |
500 – 540 nm |  |
| FDE-R394 | Viewfinder | 520 nm | Width: 65.9 mm Height: 65.9 mm Diagonal: 93.2 mm |
Width: 36.5° Height: 36.5° Diagonal: 50.0° |
500 – 540 nm | 
|
*Large-angle pattern that due to its symmetry properties is subject to geometrical distortion, if the DOE is used at laser wavelengths significantly different (Δλ > 50nm) from the design wavelength.
- Pattern-Generator
