50% attenuation filter
50% attenuation filter (medium gray mirror nd) attenuation filter (medium gray density mirror) is to weaken the amount of light entering the camera, and will not weaken much for one color light and less for other colors.
Its purpose is to weaken all the light, only the exposure of the film is changed, and it will not have any effect on the relative light and dark value of the scene. We can use the medium gray density mirror to change the brightness of the light, so as to adjust the exposure of the film to varying degrees. The effect is equivalent to shrinking the first stop, second stop, third stop or even more stop apertures. Of course, this does not mean that adjusting the aperture of the camera can replace the attenuation film. For example, in extreme environments, when the light is very strong, the attenuation film has greater adjustment flexibility to the aperture and exposure time.
| Items | Parameters |
|---|---|
| Product index | customizable |
| Size range | 10-100mm |
| Thickness | 2 ± 0.1mm |
| Density tolerance | ± 2% |
| Luminous aperture | > 90% |
| Materials | green plate glass, K9 glass, fused quartz |
| Attenuation band | (1) UV (ultraviolet band): 250nm~380nm, attenuation 20%, 50%; (2) VIS (visible light band): 400nm~700nm attenuation: 99%, 90%, 80%, 70%, 50%, 30%, 20%, 10%; (3) Vis+NIR (visible band and near infrared band): 400nm~1000nm; (4) Optical communication band: 1200nm, 1310nm, 1550nm, transmittance after attenuation 70%, 20%, 50%, 1%, etc. |
In addition, We can customize the optical filters according to customer requirements or drawings.
For details, please consult:
