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: BALL & DRUM LENSES |
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Specifications
Material: BK7 grade A optical glass
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| Diameter tolerance: ±0.01 mm |
| Sphericity: ±0.003mm |
| Surface Quality: 40/20 |
| Coating: None |
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Ball Lenses
Ball lenses are used for various tasks such as improving the coupling
between optical fibers and the emitters or detectors they interface
with. Standard size lenses range from 1.0mm to 5.0mm. Custom made
sizes or special materials are also available. All Ball lenses can
be ordered with full-surface anti-reflection (AR) coating.
The effective focal length of a ball lens is given by the following
formula:
BFL=F - D/2 and EFL=nD/4(n-1)
The Numerical Aperture, NA, of a ball lens is dependent on the
focal length of the ball and on the input diameter, d.
NA = 2d(n-1)/nD |
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Pricing and ordering info
| Model No |
Diameter |
Material |
Price |
| LB1-001 |
1.0mm |
BK7 |
$22 |
| LB1-002 |
2.0mm |
BK7 |
$21 |
| LB1-003 |
3.0mm |
BK7 |
$20 |
| LB1-004 |
4.0mm |
BK7 |
$20 |
| LB1-005 |
5.0mm |
BK7 |
$22 |
| LB2-001 |
1.0mm |
UV FS |
$34 |
| LB2-002 |
2.0mm |
UV FS |
$28 |
| LB2-003 |
3.0mm |
UV FS |
$28 |
| LB2-004 |
4.0mm |
UV FS |
$28 |
| LB2-005 |
5.0mm |
UV FS |
$30 |
| LB2-006 |
6.0mm |
UV FS |
$41 |
| LB2-008 |
8.0mm |
UV FS |
$43 |
| LB2-010 |
10.0mm |
UV FS |
$58 |
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Specifications
Material: BK7 grade A optical glass
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| Diameter tolerance: +0.0/-0.05mm |
| Length: ±0.01mm |
| Surface Quality: 40/20 |
| Coating: None |
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Drum Lenses
A Drum Lens is a variation of a ball lens where a portion of the ball is
ground down to a smaller diameter. These lenses are used in similar
applications to those of ball lenses. The Drum Lens adds the ability to
handle and package it in a different way. |
Pricing and ordering info
| Model No |
Diameter |
Length |
Price |
| LD1-020-025 |
2.0mm |
2.5mm |
$30 |
| LD1-020-030 |
2.0mm |
3.0mm |
$30 |
| LD1-020-040 |
3.0mm |
4.0mm |
$31 |
| LD1-020-050 |
4.0mm |
5.0mm |
$31 |
LD2-XXX-yyy is fused silica drum lenses. Contact
factory for pricing. |
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Tower Optical is a precision optics manufacturer
offering short lead times, excellent products, and
competitive prices.
Tower Optical Corporation
3600 S. Congress Avenue, Unit J
Boynton Beach, FL 33426 Email: sales@toweroptical.com
Phone: 1-561-740-2525
Toll Free: 1-800-526-7560
Fax: 1-561-740-2518
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©2010 contact Tower Optical Corporation for
Quality precision optics including Waveplates, Achromatic Waveplates, Retarders, Lenses, Prisms, Filters, Beam Splitters and Polarizers.
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