#optical instrument

• Tribrach — A mechanical leveling and centering base fitted with footscrews, used in surveying and geodesy as a structural support to mount optical instruments onto a tripod. It ensures horizontal structural stability and allows micro-alignment over a point.
• Ametroscope — A precision optical apparatus or instrument used in medical practices to examine the eye's degree of refraction and to diagnose refractive errors (such as myopia or astigmatism). This structural device allows for a quick evaluation of visual status by determining how light rays traverse the ocular transparent media and focus relative to the retinal plane.
• Anacamptometer — An experimental, niche optical instrument or device used for measuring reflection angles or the degree of curvature and deviation of light rays reflected from an irregular surface or through a transparent medium; an apparatus for determining the physical reflectivity index. This precision structural assembly helps calibrate complex lenses in applied physics laboratories.
• Apertometer — A precision optical instrument or device used in physics and microscopy to measure the numerical aperture of an optical lens, particularly microscope objectives, thereby determining their light-gathering capacity and resolving power.