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Laser Line Filters
商品货号:ECS000777
商品品牌:Thorlabs
详细介绍
  • 1nm, 3nm, 10nm, 12nm, 25nm, 30nm, 40nm, and 70nm laser line Bandpass Filters available
  • Edge-scribed for superb long term stability optical "Glass-to-Glass" bonding

Thorlabs' Bandpass Filters provide one of the simplest and most economical ways to transmit a well-defined wavelength band of light, while rejecting other unwanted radiation. The filter design is essentially that of a thin film Fabry-Perot Interferometer formed by vacuum deposition techniques, consisting of two reflecting stacks separated by an even-order spacer layer.

These reflecting stacks are constructed of alternating high and low refractive index materials, with the reflectance of the stack sometimes in excess of 99.99%. By varying the thickness of the spacer layer and/or the number of reflecting layers, one can alter the central wavelength and bandwidth of the filter. This type of filter displays very high transmission in the bandpass, but has a limited range of out-of-band blocking. To compensate for this deficiency, an additional blocking component is added, which is either all dielectric or metal-dielectric depending upon the required blocking range. This additional blocking component will eliminate any unwanted out-of-band radiation, but it will also reduce the overall transmission throughput of the filter.

Using these methods, Thorlabs is capable of offering a wide range of bandpass filters from 340nm - 1650nm. Also, Thorlabs is capable of offering two to four weeks turn around on custom bandpass filters; please e-mail Tech Support or call us at 973-579-7227 for requirements concerning a custom run.

 

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