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Meniscus Lenses > BK7 Meniscus Lens

Introduction

Meniscus lenses have one surface convex and the other surface concave. They are used to change the focal length of another lens. Meniscus lenses can be used with another lens to produce longer or shorter focal lengths.
 
 

Standard Specifications

  
 

Items

Specifications

Material

BK7 Grade A or equivalent Optical Glass

Designed Wavelength

546.1 nm

Designed Index

1.5183 ±0.0005

Dimension Tolerance

+0.0/-0.2 mm

Thickness Tolerance

± 0.2 mm

Paraxial Focal Length

± 2%

Clear Aperture

> 90%

Centration

3 arc minutes

Flatness

λ/4 at 632.8 nm

Surface Quality

scratch and dig 60-40

Bevel

0.5 (0/-0.3) mm

Notes:

1. Material, besides BK7, fused silica and any other materials are available.

2. Surface Quality could reach 40-20 or 20-10

3. Centration such as 1’, 30” is available.

4. Please show us the size and the coating specification.

  		 
   

 

Part NO.

f(mm)

ф (mm)

R1(mm)

R2(mm)

tc(mm)

te(mm)

fb(mm)

LMN0101

100.0

25.4

33.72

90.00

4.0

2.5

97.5

LMN0102

125.0

25.4

38.47

90.00

4.0

2.8

121.8

LMN0103

150.0

25.4

42.52

90.00

4.0

3.0

146.3

LMN0104

175.0

25.4

46.05

90.00

4.0

3.1

171.2

LMN0105

200.0

25.4

49.03

90.00

3.5

2.8

197.0

LMN 0201

-100.0

25.4

90.00

32.59

3.0

4.5

-99.2

LMN 0202

-125.0

25.4

90.00

37.26

3.0

4.2

-123.7

 

  
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Meniscus Lens
Meniscus Lens
 

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