Changchun Hengyi Optics Co., Ltd can manufacture various optical filters, such as Color Separation Filters, Neutral Density Filters, Short/long wave Pass Filters, Bandpass Filters, etc.

Color Separation Filters

Color separation filters, are used in optical systems where the incident light needs to be split into two or more wavelength regions or 'colors' with a high degree of efficiency. 

Custom products
Our ability can be up to:
Material: Optical crown glass(BK7A) or other materials
Diameter: 2-300mm
Diameter Tolerance: -0.10mm
Minimal Thickness:0.5mm
Parallelism: 1 arc minutes
Flatness: λ/10 at 632.8nm
Surface Quality:20-10 scratch dig
Clear Aperture: 90% of Diameter
Operating Temperature:Up to 200°C

Neutral Density Filters
(i)Neutral Density Filters - Absorptive
(ii)Neutral Density Filters - Reflective

The main purpose of using neutral density filters is to reduce the amount of light that can pass through the lens. As a result, if a shutter speed is kept the same, after adding a neutral density filter, a larger aperture must be used to obtain the same exposure. Similarly, if an aperture is kept the same, after adding a neutral density filter, a slower shutter speed must be used to obtain the same exposure.
 

Custom products
Our ability can be up to:
Material: Specified by customers
Diameter: 2-300mm
Diameter Tolerance: -0.10mm
Minimal Thickness:0.5mm
Parallelism: 1-3 arc minutes
Flatness: λ/10 at 632.8nm
Surface Quality:20-10 scratch dig
Optical Density:Specified by customers
Clear Aperture: 90% of Diameter
Coating: specified by customers