- Product Details
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Quick Details
-
Place of Origin:
-
China
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Brand Name:
-
Dongqiao
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Model Number:
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DQ-BP
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Name:
-
Bandpass filter
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Material:
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optical glass
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Coating:
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Customer Request
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Parallelism:
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30 arc sec
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Clear Aperture:
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>90%
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MOQ:
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1 piece for sapphire window
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Bevel:
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0.1-0.5mm
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Surface quality:
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20/10---80/50
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Origin:
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China
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Tolerance:
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0.05
Quick Details
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Use:
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Optical
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Structure:
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Plano-convex
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Shape:
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PLANO
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Place of Origin:
-
China
-
Brand Name:
-
Dongqiao
-
Model Number:
-
DQ-BP
-
Name:
-
Bandpass filter
-
Material:
-
optical glass
-
Coating:
-
Customer Request
-
Parallelism:
-
30 arc sec
-
Clear Aperture:
-
>90%
-
MOQ:
-
1 piece for sapphire window
-
Bevel:
-
0.1-0.5mm
-
Surface quality:
-
20/10---80/50
-
Origin:
-
China
-
Tolerance:
-
0.05
Description
Optical Bandpass Filter
Band pass filter can separate a band of monochromatic light,it allows the optical signal to pass through in a specific band, while the optical signals on both sides of the band are blocked. The actual band-pass filter generally has a center wavelength λ0, a transmittance T0, a half width of the pass band (FWHM, a distance between two positions where the transmittance in the pass band is half the peak transmittance), the cut off range and other key parameters to describe.
Band-pass filter is divided into
narrow-band filter
and
broadband filter
.
In general, a very narrow bandwidth or high cut-off steepness will make the product more difficult to process; meanwhile the pass band transmittance and cut-off depth is also a contradictory indicator
In general, a very narrow bandwidth or high cut-off steepness will make the product more difficult to process; meanwhile the pass band transmittance and cut-off depth is also a contradictory indicator
Dongqiao Optics' band-pass filters are composed of a stack of equally spaced dielectric layers. The number of layers and thicknesses are calculated with excellent cut-off depth (typically up to OD5 or higher), better steepness and a high transmittance(70% narrowband, 90% broadband).
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