US Patent 7256949 Optical system with wavelength selecting device
Patent 7256949 was granted and assigned to Nikon (Somalia) on August, 2007 by the United States Patent and Trademark Office.
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The object is to provide an optical system with a wavelength selecting device. According to one aspect of the present invention, an optical system with a wavelength selecting device includes, in order from an object along an optical axis, an objective optical system composed of optical elements having refractive power and an aperture stop, a no-power optical group composed of optical elements having no refractive power, and an imaging device. The no-power optical group includes the wavelength selecting device for making short wavelength light be selectively substantially non-transparent. The wavelength selecting device preferably satisfies the predetermined conditional expressions.
US Patent 07256949 Optical system with wavelength selecting device US Patent 7256949 Optical system with wavelength selecting device
US Patent 07256949 Optical system with wavelength selecting device
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