概述
- Material: ZnSe (Zinc Selenide)
- Machinable diameter: Ø1-Ø500mm
- Focal length range: 4.5-1000mm
- Wavelength range: 0.6-16μm (uncoated), 7-12μm (IR2 broadband anti-reflection film)
Zinc Selenide (ZnSe) Double Concave Lenses have a negative focal length and can diverge a parallel beam to the virtual focus, making it an excellent choice for diverging convergent beams and for relay imaging systems.
ZnSe biconcave lenses are based on zinc selenide, which has low absorption, thermal shock resistance, wide transmission band (600nm-16μm), and low absorption in the red part of the visible spectrum, so it is often used in optical systems that combine CO2 lasers (operating at 10.6μm) with inexpensive helium-neon lasers.
Dimension-Labs offers a wide range of formats of uncoated ZnSe bi-concave lenses (specific sizes and parameters can be filtered from the details below) and a reflection enhancement film (IR2 broadband anti-reflection film) to meet your needs for a variety of applications.
Precautions for use: Zinc selenide is a toxic substance, in order to ensure your safety, please wear gloves when operating related components, and thoroughly clean your hands after the operation is completed.
General parameters
| Material | ZnSe | Effective aperture | >80% |
| Face | λ/2@632.8nm | Finish | 60-40 |
| Design wavelength(μm) |
10.6 |
Focal length tolerance | ±1% |
| Form Tolerance(mm) |
+0.0/-0.1 |
Thickness tolerance(mm) |
±0.2 |
| Eccentricity | ＜3ˊ |
Inverted side | ＜0.2×45° |
ZnSe bi-concave lens, uncoated（0.6-16μm）
● Optical component material: zinc selenide ● Working wavelength: 600nm-16μm (uncoated) ● Multiple diameters and focal lengths are available ● Usage: imaging, beam expansion, beam reduction
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ZnSe bi-concave lens，IR2（7-12μm）
● Optical component material: zinc selenide ● Working wavelength: 7-12μm ● Multiple diameters and focal lengths are available ● Usage: imaging, beam expansion, beam reduction
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