1.What are plano-concave lenses used for?

 Plano concave lenses, which have one concave surface, are optical lenses with negative focal lengths, they are ideal for beam expansion, light projection, or for expanding an optical system's focal length. Uni-Optics offers PCV lenses with a variety of coating options, and they are ideal for use in a range of applications or industries.

2.What kinds of materials can UNI Optics use to make plano-concave lenses?

CDGM optical glasses, SCHOTT, OHARA, Fused Silica, Sapphire, Germanium, Silicon, calcium fluoride (CaF2), Zinc Selenide (ZnSe), and other infrared materials.

3.What is UNI Optics manufacturing capability about plano-concave lenses?

Specification:

Spherical concave lenses are used for light projection and beam expansion.With double-concave (DCV) lenses, both surfaces have a concave radius, giving them a shorter focal length than PCV lenses of equal radius of curvature. The most common materials used for spherical concave lenses are BK7 and UVFS.

Material:    Optical glass&Fused silica

Design wavelength:    546.1nm
Diameter tolerance:    +0/-0.05mm
Focal tolerance:    +/-2%
surface quality :    40-20 S/D 
Centration:    1 arcmin 
Surface flatness:     N=3 △N=0.5
Clear aperture:    90%
Bevel:     Protective
Coating:  Optional
Single layer MgF2
Multiple layers BBAR coating
Designed for 0° Angle of Incidence
 

The edges of plano-concave lenses are thicker than the center and flat on one side. Plano-concave lenses are used to expand beams or increase the focal length in optical systems, so they can be used in beam expanders and projection systems.

A plano-concave lens is a diverging lens. A plano-concave lens bends parallel input rays to diverge from each other on the output side of the lens, thus having a negative focal length.