25x21 mm N-BK7 Plano-concave Lens

Product description

The plano-concave lens made from N-BK7 is ideal for applications requiring beam divergence and focal length extension in optical systems. With a diameter of 25 mm and a focal length of -21 mm, this lens is designed to expand beams effectively. Its uncoated surface ensures versatility across various optical applications, while the 60/40 surface quality meets essential performance standards.

Key Features

Diameter: 25 mm for compatibility with standard optical setups.
Focal Length: -21 mm enables effective beam divergence.
Surface Quality: 60/40 ensures reliable optical performance.
Clear Aperture: >90% for minimal light loss.
Customizable: OEM, ODM, and OBM support available.

Available Sizes

Diameter x Focal Length (mm)
25 x 21

Specification Summary

Item	Value
Material	N-BK7
Shape	Plano-concave
Diameter	25 mm
Focal Length	21 mm
Surface Quality	60/40
Coating	uncoated

Full Specifications

Parameter	Value
Type	Concave Lens
Customized Support	OEM, ODM, OBM
Warranty	3 Years
Weight	0.02
Surface Flatness	lambda/4
Center Thickness	2mm
Clear Aperture	> 90%

FAQ

What custom sizes are available?

Variant sizes include a diameter of 25 mm and a focal length of 21 mm.

What is the minimum order quantity?

Minimum order quantity details are not specified, allowing for flexibility.