Spherical Optical Glass Biconcave Lenses 20mm 25mm

• Customization: Available
• Usage: Optical
• Type: Concave Lens
• Shape: Double Concave
• Material: Optical Glass
• Lenses Color: Clear
• Certification: RoHS, ISO9001, CE
• Customized: Customized
• Coating: HC
• Transport Package: Foam Carton Inner, Then Cartons to Pack Them
• Specification: customized
• Trademark: YBT
• Origin: Shen Yang
• Production Capacity: 2000

Product Description

Product Description
Optical Lenses are optical components designed to focus or diverge light, widely applicated from microscopy to laser processing. A Plano-Convex or Double-Convex lens causes light to focus to a point, while a Plano-Concave or Double-Concave lens diverges the light which traveling through the lens. Achromatic Lenses are ideal for correcting color, aspheric lenses are designed to correct spherical aberration.Ge, Si, or ZnSe lenses are suited for transmitting the Infrared (IR) spectrum, fused silica is well suited for the Ultraviolet (UV). 


Double-Concave Lenses
Double-Concave (DCV) Lenses have two inward curved surfaces and a negative focal length. They are used for image reduction and to spread light.

Diameter Tolerance	+0.0/-0.05mm
Center Thickness Tolerance	±0.2mm
Focal Length Tolerance	±2%
Surface Quality	60/40, 40/20 or better..
Material	BK7, UVFused silica, Ge,CaF2, ZnSe
Clear Aperture	>90%
Centering	<1 arc min
Coating	Custom
Bevel	Protective bevel as needed

Shenyang Ebetter Optics Co., Ltd. has been engaged in more than 20 years. We have rich experience in production and customer service, it can meet the different custom requirement of customers.Our main products include Diffraction gratings, Optical lens, prisms, Optical mirrors, Optical windows and Optical filters etc.All products of our company have passed CE and RoHS certification, and we have ISO9001 certification.