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RFQ

Dichroic filter

Product Info

A dichroic filter, thin-film filter, or interference filter is a very accurate color filter used to selectively pass light of a small range of colors while reflecting other colors. Dichroic filters can filter light from a white light source to produce light that is perceived by humans to be highly saturated (intense) in color.

 

    There are substrates which are coated with thin-films to acquire the desired transmission and reflection characteristics across the spectrum. They are often used as color filters (both subtractive and additive). They are slightly sensitive to angles but are much more forgiving than interference filters. 



Specifications

 

Material:

H-K9L, fused silica

Diameter:

+0/-0.2mm

Thickness:

+/-0.1mm

Clear aperture:

> 90% of diameter

Parallelism:

< 1 arc minute

Surface quality:

60-40 scratch and dig

Transmitted wavefront, P-V

λ/4 @632.8nm

Edge:

Ground

Wavelength (nm):

upon request

Angle of incidence:

0 degree

Transmission:

T ave > 90%

Reflection:

R ave > 98%

A dichroic filter, thin-film filter, or interference filter is a very accurate color filter used to selectively pass light of a small range of colors while reflecting other colors. Dichroic filters can filter light from a white light source to produce light that is perceived by humans to be highly saturated (intense) in color.

 

    There are substrates which are coated with thin-films to acquire the desired transmission and reflection characteristics across the spectrum. They are often used as color filters (both subtractive and additive). They are slightly sensitive to angles but are much more forgiving than interference filters. 



Specifications

 

Material:

H-K9L, fused silica

Diameter:

+0/-0.2mm

Thickness:

+/-0.1mm

Clear aperture:

> 90% of diameter

Parallelism:

< 1 arc minute

Surface quality:

60-40 scratch and dig

Transmitted wavefront, P-V

λ/4 @632.8nm

Edge:

Ground

Wavelength (nm):

upon request

Angle of incidence:

0 degree

Transmission:

T ave > 90%

Reflection:

R ave > 98%