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  4. Optical lens biconcave lens DCV BK-7 (Koyo Co., Ltd.)
Optical lens biconcave lens DCV BK-7-DCV A FL -7.6mm
Optical lens biconcave lens DCV BK-7-Koyo Co., Ltd.

Optical lens biconcave lens DCV BK-7
Koyo Co., Ltd.

Koyo Co., Ltd.'s Response Status

Response Rate

100.0%

Response Time

1.2hours

Very Fast Response

About This Product

■Basic properties: concave lens

A lens that diverges light, contrary to a convex lens, is called a concave lens. Depending on the shape of both sides of the lens, there are various types: biconcave, plano-concave, and convex-concave (concave meniscus). Light passing through a concave lens mainly has the following properties. - After passing through a concave lens, light rays parallel to the axis spread out and proceed as if they were coming from a single point (focal point) on the axis on the incident side (divergence). ・Light rays heading towards the focal point at the back of the lens travel parallel to the axis after passing through the concave lens. ・Light rays passing through a node travel without changing the angle, just like a convex lens. The image formed by a concave lens is always an erect virtual image and is on the same side as the object. When the focal length is expressed as a negative number (f0), the same lens formula as for a convex lens holds true.

■Material: BK-7

BK Group glass has been widely used for a long time because it has good light transmittance up to short wavelengths, has few bubbles, striae, and discoloration, and is hard and scratch-resistant. Among them, BK7 is a relatively hard glass that is scratch resistant, easy to handle, and does not require any special treatment when polishing. The bubbles and inclusions contained in BK7 are 0.029 mm2 per 100 cm2, and it has good transmittance for wavelengths above 350 nm.

  • Product

    Optical lens biconcave lens DCV BK-7

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1 Models of Optical lens biconcave lens DCV BK-7

Image Part Number Price (excluding tax) Diameter (mm) Product number Center thickness Edge thickness (mm) FL (mm) BFL (mm) Code
Optical lens biconcave lens DCV BK-7-Part Number-DCV A FL -7.6mm

DCV A FL -7.6mm

$ 19.50〜

5

1068

1

1.8

-7.6

-7.9

335

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About Company Handling This Product

Koyo Co., Ltd.

Response Rate

100.0%

Response Time

1.2hrs

  • Japan

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Optical Lens
Optical Lens　Koyo Co., Ltd.
Koyo Co., Ltd.

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