|
BK7 Windows and Rods
BK7 is borosilicate crown optical glass with an excellent physical and chemical properties for
applications in visible and near IR. Large BK7 glass with high homogeneity, low bubble and inclusion content can
be produced at a large quantity and at low cost, making it the
standard material for optical components ( uncoated or coated ) in visible and IR.
Basic Properties
|
Shapes and Geometries |
|
Round Parallel Windows/Rods
|
Square Parallel Windows/Rods
|
Standard Products
|
Part No. |
Dimensions (mm) |
Coating |
In stock |
|
Dia=1.0"=25.4mm |
|
BKG1010 |
φ25.4 x 1.0 |
Uncoated |
Yes |
|
BKG1020 |
φ25.4 x 2.0 |
Uncoated |
Email/Call |
|
BKG1050 |
φ25.4 x 5.0 |
Uncoated |
Email/Call |
|
BKG1060 |
φ25.4 x 6.0 |
Uncoated |
Email/Call |
|
BKG1063 |
φ25.4 x 6.35 (1/4") |
Uncoated |
Email/Call |
|
BKG1095 |
φ25.4 x 9.52( 3/8") |
Uncoated |
Email/Call |
|
BKG1127 |
φ25.4 x 12.7 (1/2") |
Uncoated |
Email/Call |
|
BKG1300 |
φ25.4 x 30.0 |
Uncoated |
Email/Call |
|
BKG1500 |
φ25.4 x 50.0 |
Uncoated |
Email/Call |
|
BKL1100 |
φ25.4 x 100.0 (long rod) |
Uncoated |
Email/Call |
|
BKL1150 |
φ25.4 x 150.0 (long rod) |
Uncoated |
Email/Call |
|
Dia=2.0"=50.8mm |
|
BKG2063 |
φ50.8 x 6.35 (1/4") |
Uncoated |
Email/Call |
|
BKG2095 |
φ50.8 x 9.52( 3/8") |
Uncoated |
Email/Call |
|
BKG2127 |
φ50.8 x 12.7 (1/2") |
Uncoated |
Email/Call |
|
Square Windows |
|
BKW1010 |
25.4x 25.4 x 1.0 |
Uncoated |
Email/Call |
|
BKW1020 |
25.4 x 25.4 x 2.0 |
Uncoated |
Email/Call |
|
BKW1040 |
25.4 x 25.4 x 4.0 |
Uncoated |
Yes |
|
BKW1050 |
25.4 x 25.4 x 5.0 |
Uncoated |
Email/Call |
|
BKW1254 |
25.4 x 25.4 x 25.4 |
Uncoated |
Email/Call |
In addition to these standard parts, Newlight can
produce a wide variety of custom BK7 products. Please
contact us
for assistance for your custom requirements.
N-BK7, the ROHS version of standard BK7 may be used for
the windows without notice. N-BK7 will always be used for EU customers
in compliance with the RoHS regulations. Please let us know if N-BK7 and BK7 have
to be distinguished for your applications.
Coatings:
Various high quality HR, AR, Broadband AR ( BBAR) and partial reflective (PR) coatings are also available
upon request.
AR Coatings: R<0.2% at the central wavelength
HR Coatings: R>99.6% at the central wavelength
PR Coatings: R=3-95% at the specified wavelength
Broadband AR: R<1% over the specified range
Specifications of BK7 Windows
|
Dimension Tolerance: |
± 0.1mm |
|
Clear Aperture: |
> 85% |
|
Surface Quality: |
10/5 Scratch and Dig
|
|
Perpendicularity: |
< 10 arc min |
|
Parallelism: |
< 1 arc min |
|
Flatness:
|
λ/10 @ 632.8nm |
|
Transmission
Wavefront Distortion: |
< λ/10 @632.8nm |
|
Bevel: |
<0.25mm X 45° |
|
