CALL:+ 86 591 87303536
描述
RFQ

Notch filter

Product Info

    In signal processing, a band-stop filter or band-rejection filter is a filter that passes most frequencies unaltered, but attenuates those in a specific range to very low levels. It is the opposite of a band-pass filter. A notch filter is a band-stop filter with a narrow stop band. Narrow notch filters are used in Raman spectroscopy, live sound reproduction and in instrument amplifiers to reduce or prevent audio feedback, while having little effect on the rest of the frequency spectrum. 


20191125153633995


Specifications

 

Material:

H-K9L

Size:

+/-0.1mm

Clear aperture:

> 90%

Parallelism:

< 1 arc minute

Surface quality:

60-40 scratch and dig

Transmitted wavefront, P-V

λ/4 @632.8nm

Edge:

Ground

Angle of incidence:

0 degree

Center wavelength:

355,   488, 532, 632.8, 808, 1064nm…  

Band width:

10 - 60nm

Blocking depth:

> OD4

Transmission:

Tave  > 90%

 


    In signal processing, a band-stop filter or band-rejection filter is a filter that passes most frequencies unaltered, but attenuates those in a specific range to very low levels. It is the opposite of a band-pass filter. A notch filter is a band-stop filter with a narrow stop band. Narrow notch filters are used in Raman spectroscopy, live sound reproduction and in instrument amplifiers to reduce or prevent audio feedback, while having little effect on the rest of the frequency spectrum. 


20191125153633995


Specifications

 

Material:

H-K9L

Size:

+/-0.1mm

Clear aperture:

> 90%

Parallelism:

< 1 arc minute

Surface quality:

60-40 scratch and dig

Transmitted wavefront, P-V

λ/4 @632.8nm

Edge:

Ground

Angle of incidence:

0 degree

Center wavelength:

355,   488, 532, 632.8, 808, 1064nm…  

Band width:

10 - 60nm

Blocking depth:

> OD4

Transmission:

Tave  > 90%