Ball Lenses

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Ball Lenses
Ball lenses - a cost effective tool for improving coupling efficiency between fibers, emitter and detectors.
Coatings Available on request
Diameter Tolerance, mm +0/ -0.005 mm
Sphericity <0.003 mm
Surface Quality, S-D 60/40 S/D
Description

Details

Ball lenses are used in endoscopy, bar code readers. Lenses are made of single piece of glass  and can focus or collimate light, depending upon the geometry of the input source. Ball lenses are rarely used for imaging, so that the relevant optical characterization revolves about determination of focal lenght. Given a ball lens with diameter D, made from glass with index nL, operated in air, the effective focal length, measured from the center of the lens, is easily found from (1). Since ball lenses are very "thick" lenses, the difference between EFL and BFL is significant and can be calculated from (2). The numerical aperture depends on the aperture employed; for an aperture diameter Da, where Da

(1) EFL=nD/(4(n-1)
(2) BFL=EFL-D/2
(3) NA=((nL-1)/nL)*2Da/D 

Features
  • Easily positioned, since orientation is irrelevant.
  • High diameter tolerance and spherisity
  • Sapphire and ruby lenses feature high strenght, hardness and chemical stability
  • UV fused silica lenses available for use in applications where excellent UV transmission is required
Name Diameter, mmMaterial Price Quantity

1-PL-1-D10

1UV fused silica
US$36.40

1-PL-1-D20

2UV fused silica
US$35.10

1-PL-1-D30

3UV fused silica
US$28.60

1-PL-1-D40

4UV fused silica
US$28.60

1-PL-1-D50

5UV fused silica
US$28.60

1-PL-2-D10

1BK7
US$19.50

1-PL-2-D20

2BK7
US$19.50

1-PL-2-D30

3BK7
US$19.50

1-PL-2-D40

4BK7
US$19.50

1-PL-2-D50

5BK7
US$19.50

1-PL-3-D10

1S-LAH79
US$52.00

1-PL-3-D20

2S-LAH79
US$52.00

1-PL-3-D30

3S-LAH79
US$52.00

1-PL-3-D40

4S-LAH79
US$52.00

1-PL-3-D50

5S-LAH79
US$52.00

1-PL-4-D10

1Ruby
US$13.00

1-PL-4-D20

2Ruby
US$13.00

1-PL-4-D30

3Ruby
US$13.00

1-PL-4-D40

4Ruby
US$15.60

1-PL-4-D50

5Ruby
US$18.20

1-PL-5-D10

1Sapphire
US$13.00

1-PL-5-D20

2Sapphire
US$13.00

1-PL-5-D30

3Sapphire
US$13.00

1-PL-5-D40

4Sapphire
US$13.00

1-PL-5-D50

5Sapphire
US$13.00
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