#optics instrument

• Anamorphoser — An apparatus, device, or accessory optical system (such as an attachment lens, a prism, or a special mirror) used to produce an anamorphosis or to restore the normal proportions of an already compressed image. As an adjective, it describes any technical element, transparent medium, or geometric effect possessing the structural capacity to controllably distort or decompress light beams within a projection system.
• Auxometer — A special optical instrument or apparatus used to determine and measure the magnifying power of a lens system, microscope, or telescope; a precision device engineered to measure the exit pupil diameter or the ratio between image size and actual object size.