Laser Line Interference Filter

Interference filters are fabricated by a series of thin layers of various dielectric materials sandwiched by glass substrates. When multi-wavelength light passes through the filter interference occurs due to the differences in refractive index, resulting in a very high transmittance for certain wavelengths, while other wavelengths are either reflected or absorbed. For a given wavelength a very narrow bandwidth (3nm-10nm) can be obtained. Optical interference filters are angle-sensitive and should be used with normal or near normal incident light. If the incident angle exceeds 20° it is essential to specify s-polarization, p-polarization or random (the average of s and p performance) when ordering. Filters for the major laser wavelengths are available from stock. Those for other wavelengths and dimensions may be custom designed. These filters are extremely durable and withstand repeated cleaning.

Part No.

Wavelength (mm)

Wavelength Tolerance

Peak Transmission

LF0101
355
± 2nm
40%
LF0102
488
± 2nm
60%
LF0103
514.2
± 2nm
70%
LF0104
532
± 2nm
70%
LF0105
632.8
± 2nm
70%
LF0106
670
± 2nm
70%
LF0107
780
± 2nm
70%
LF0108
820
± 2nm
70%
LF0109
850
± 2nm
70%
LF0110
980
± 2nm
70%
LF0111
1064
± 2nm
70%
LF0112
1550
± 2nm
70%
Please refer to the Glossary and Technology for more information about waveplates.
Other sizes and coatings are available upon request.