A tunable optical filter comprises an optical switch having a single first optical port and a plurality of second optical ports; a plurality of band pass filters, each one of the band pass filters optically coupled to a respective second optical port; and an optical multiplexer having a plurality of inputs and a single output, each input optically coupled to a respective band pass filter, wherein the optical switch delivers a plurality of optical channels to a selected one of the band pass filters, the selected band pass filter transmitting a single selected optical channel to an input of the optical multiplexer. Alternatively, the multiplexer may be substituted by a second optical switch. Optionally, the band pass filters may reflect other channels back to the plurality of second optical ports.

 
Web www.patentalert.com

< Method for correcting distortion of captured image, device for correcting distortion of captured image, and imaging device

> In-plane switching mode liquid crystal display device having a biaxial optically anisotropic member

> Fiber optic sight for firearms with nighttime capabilities

~ 00596