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Colored glass filters are optical components that control incident wavelength by distributing an optical absorbing substance in glass.
Product Origin:
ChinaOrder(MOQ):
10Shipping Port:
Fuzhou, ChinaLead Time:
4 weeks
1.1、How do optical filters work?
Optical filters are passive devices that allow the transmission of a specific wavelength or set of wavelengths of light. Absorptive filters have a coating of different organic and inorganic materials that absorb certain wavelengths of light, thus allowing the desired wavelengths to pass through.
1.2、What is the central wavelength of a red filter?
Recall that the visible wavelength ranges are: 430 to 490 nm = blue; 490 to 530 nm = green; 530 to 580 nm = yellow; 580 to 630 nm = orange and 630 to 700 nm = red.
1.3. Common specification
|
Specification |
Standard |
High Precision |
|
Dimension Tolerance |
+0.0/-0.2 |
+0.0/-0.02 |
|
Thickness Tolerance |
±0.2 |
±0.05 |
|
Surface quality: |
60-40 |
20-10 |
|
Clear Aperture |
>85% |
>95% |
|
Flatness(per 25mm@633nm) |
λ /2 |
λ /8 |
|
Parallelism |
3 min |
10 sec |
|
Material |
color glass |
|
|
Bevel |
<0.25mm X 45° |
|
|
Coating |
Optional (Uncoated, AR Coating, etc.) |
|
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