OptoSigma's concave or focusing mirror subrates are available in a varity of sizes and radii. We are more than willing to apply an optical coating of your choice based upon your requirments. Typically, concave or "Focus" mirrors are utilized for light collection or imaging appliations. All of these substrates have a fine ground back surface. If your application requires any light transmissions, we suggest to utilize our concave lenes.
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