ZnSe Prism

ZnSe Prisms Diagram

Attenuated Total Reflection (ATR) Prism uses the property of total internal reflection and attenuates the reflected light by forming an evanescent wave while penetrating some (0.5-2µm) into the sample.  The penetration depth into the sample depends on the refractive index of sample and prism, incident angle, wavelength, sample contact and reactivity of the material.  This prism is useful in Fourier Transform Infrared (FTIR) spectroscopy to analyse the sample properties.  Customized ATR Prism is available upon request.

Material

Zinc Selenide (ZnSe)

Dimensional Tolerance

+/- 0.1mm

Type

Attenuated Total Reflection

Angular Deviation

0.2°

Surface Quality

60/40

Coating

Options Available

Part No.MaterialL1 (mm)L2 (nm)H (mm)
ATRZ-52.5*20*2ZnSe52.5202

ZnSe Prisms Rhomb

ZnSe Prisms Diagram 2
ZnSe Prisms Diagram 3
ZnSe Prisms Diagram 4

Fresnel prism rhomb is advantageous than reflective phase retarder and waveplate that use birefringence material.  The retardation depends on the index of refraction of material and geometry but not the design wavelength.  The desired phase shift can be constructed by shining light in the 8-12µm region at a selected incident angle, allowing it to make the required number of internal reflections by using the principle of total internal reflection.  The rhomb improves the quality of laser cutting in laser processing applications. We offer customization of prism rhomb to meet the specific customer needs.

Material

Zinc Selenide (ZnSe)

Dimensional Tolerance

+/- 0.1mm

Type

Quarter Wave & Half Wave

Angular Deviation

0.2°

Surface Quality

60/40

Coating

Options Available

Polishing required

@ Input, output, top and bottom surfaces

Part NumberWavelength (µm)Dimensions (mm)AngleRetardation
WFP4-51.5x13.2x12Z8.0 - 12.051.5 x 13.2 x 12.065°, 115°λ/4
WFP4-58.3x15x13.6Z8.0 - 12.058.3 x 15.0 x 13.665°, 115°λ/4
WFP2-26.5x15x39.1Z8.0 - 12.026.5 x 15.0 x 39.1123°, 147°λ/2

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