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MSE PRO BK7 Bi-Concave Lenses with 1/4 Wave MgF2 Coating@550nm, Ø1/2"– MSE Supplies LLC

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MSE PRO BK7 Bi-Concave Lenses with 1/4 Wave MgF<sub>2</sub> Coating@550nm, Ø1/2"

MSE PRO BK7 Bi-Concave Lenses with 1/4 Wave MgF2 Coating@550nm, Ø1/2"

SKU: ACB7BC5-0.5--19

  • $ 3995

MSE PRO™ BK7 Bi-Concave Lenses with 1/4 Wave 

MgF2 Coating@550nm, Ø1/2"

MSE supplies offers Ø1/2" BK7 Bi-Concave Lenses with 1/4 Wave MgF2 Coating@550nm. Similar to plano- concave lenses, a bi-concave lens diverges parallel input rays and has a negative focal length. It has a virtual focus at the object side of the lens. Bi-concave lenses are usually suitable for absolute conjugate ratios closer to 1:1.

MSE Supplies can offer a variety of optical elements, with different focal length and coating options. Please contact us for customization or bulk orders. 

Technical Data:

Material BK7 grade A, fine annealed
Diameter (Ø) Tolerance +0.0/-0.20
Center Thickness (Tc) ±0.1
Centration 3’
Form Error 1 ～ 5 fringes
Irregularity of Fringes 0.2 ～ 0.5 fringes
Surface Quality 60-40 scratch-dig
Clear Aperture 90% diameter