Hanzhong Brisun Optics Co., Ltd. Is the high High precision optical element manufacturer provides customized production of Various optical lenses, including spherical lens, cylindrical lens, optical window, mirror, prism, filter, metal base mirror and other high-precision optical elements. The base materials include various optical glass, fused quartz, calcium fluoride (CaF2), zinc selenide (ZnSe), germanium (GE), silicon (SI), sapphire, metal and other materials. And provide antireflective film, high reflection film, spectroscopic film, metal film and other optical coatings.

The plano concave lens is used to diverge the parallel light outward. The focal length of the flat concave lens is negative and the spherical aberration is also negative. It can be used to correct the phase difference, spherical aberration, coma and distortion of other lenses. Similar to the flat concave mirror, the side is generally opposite to the far object surface or infinity.

K9 plano concave spherical lens can see the transmittance of near infrared (350-2000nm).

H-K9L (N-BK7) is an optical glass commonly used in the preparation of optical elements.

These uncoated plano concave lenses are prepared using H-K9L (N-BK7) conforming to ROHS standard. The collimated beam can converge on the rear focus, or the point light source can be changed into a collimated beam.

Technical parameters:
Material: optical glass, H-K9L (N-BK7),fused quartz, calcium fluoride (CaF2), zinc selenide (ZnSe), germanium (GE), silicon (SI), sapphire
Radius of curvature: ± 1mm - ± 50000mm ± 1%
Outer circle: 3mm-500mm ± 0.1mm
Center thickness tolerance: ± 0.05mm (we can process to ± 0.01mm with high precision)
Center deviation: 3′(we can process to 30 ″with high precision)
Surface accuracy: λ/ 8 (high precision, we can process to 1 / 10λ)
Surface quality: 60/40 (we can process to 10-5 with high precision)
Effective caliber: ≥90%
Coating: Coating: multilayer antireflective film
A:350-650nm
B:650-1050nm
C:1050-1580nms

In addition, we have thousands of kinds of stock, such as quartz plano convex lens, quartz plano concave lens, quartz biconvex lens, quartz biconvex lens, cylindrical lens, prism, filters, windows, beamsplitter and so on. The price is preferential and the quality is excellent, which can meet your demand for a small order.

If you are interested it, welcome to inquiry us or search "Hanzhong Borisun Optics Co.,Ltd "to know about more details.