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Custom-made
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Etalon is made of two parallel high reflecting mirrors and used as a narrow band filter. Widely used in astronomical observation and interferometer measurement.

◦The etalons are customized according to your application; we are proposing 4 basic choices. Please see the illustrations.
◦Please fill your requirement details onto the following inquiry form; our Sales Division will contact you with a quotation.

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Attention

▶If the angle of incident is not correctly set the transmittance wavelength may be displaced or the light does not transmit as planned.
▶Question about the characteristic of the finesse or the transmission of the Etalon, please contact our International Sales Division.
▶The lead time of some model are expected to be long for further information, please contact our International Sales Division.

Contact sheet

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Common Specifications
MaterialSynthetic fused silica
Surface flatness<λ/20 (λ=632.8nm)
Incident angle
Outline Drawing
■Solid Etalon

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R = Dielectric multi-layer coating (high reflectance) AR = Anti-reflective coating

Simple structure and easy to use but the characteristic depends on the refractive index of the glass.
■Tube type: pair Etalon

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R = Dielectric multi-layer coating (high reflectance) AR = Anti-reflective coating

Air spaced with no effects from refractivity of the glass.
The resonator is covered, less noise effects from outside.
■3 pieces pair Etalon

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R = Dielectric multi-layer coating (high reflectance) AR = Anti-reflective coating

Air spaced with no effects from refractivity of the glass.
The resonator is uncovered, easy to be effected by noise.
■4 pieces pair Etalon

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R = Dielectric multi-layer coating (high reflectance) AR = Anti-reflective coating

Air spaced with no effects from refractivity of the glass.
The resonator length is narrow which enable to get a wider FSR (Free Spectral Range).
Schematic

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Part Number

Catalog PDF

dxf

STP

IGS

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Zemax

Custom-made_Etalon

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