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  2. Optical manufacturing and testing - Wikipedia

    en.wikipedia.org/wiki/Optical_manufacturing_and...

    It involves the use of small particles of grit to grind away small chips of material from the surface of an optical workpiece. The grit particles are known as free abrasives. The particles are added to a liquid slurry, which goes between a grinding plate and the material. Sliding motions between the grinding plate and the material are used. [4]

  3. List of instruments used in otorhinolaryngology, head and ...

    en.wikipedia.org/wiki/List_of_instruments_used...

    to focus light into the cavity under inspection; mirror is concave and is used with a Chiron lamp to produce a parallel beam of light; doctor views through the hole (average diameter of mirror is 3 & 1/2" & that of hole is 1/4") Head mounted lights with head band: to focus light into the cavity under inspection Chiron lamp: source of light Katz ...

  4. Pinhole occluder - Wikipedia

    en.wikipedia.org/wiki/Pinhole_occluder

    An improvised pinhole has a similar but better effect. The same principle has also been applied as an alternative to corrective lenses: a screen of pinholes is mounted on an eyeglass frame and worn as pinhole glasses. Differential diagnosis: pinhole worsen vision: Macular diseases, [5] central lens opacities [6] Vision static with pinhole ...

  5. Slit lamp - Wikipedia

    en.wikipedia.org/wiki/Slit_lamp

    These optics usually take the form of a lens placed on or near the subject's cornea, which range in optical properties and practical application. [19] Watzke–Allen test is a test used in diagnosis of a full thickness macular hole and also to assess retinal function after surgical closure of the hole, with the help of slit lamp. [20] [21]

  6. Automated optical inspection - Wikipedia

    en.wikipedia.org/wiki/Automated_optical_inspection

    Automated optical inspection (AOI) is an automated visual inspection of printed circuit board (PCB) (or LCD, transistor) manufacture where a camera autonomously scans the device under test for both catastrophic failure (e.g. missing component) and quality defects (e.g. fillet size or shape or component skew). It is commonly used in the ...

  7. Optical comparator - Wikipedia

    en.wikipedia.org/wiki/Optical_comparator

    The profile projector is widely used for complex-shape stampings, gears, cams, threads and comparing the measured contour model.The profile projector is hence widely used in precision machinery manufacturing, including aviation, aerospace industry, watches and clocks, electronics, instrumentation industry, research institutes and detection metering stations at all levels, etc.

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. Pinhole (optics) - Wikipedia

    en.wikipedia.org/wiki/Pinhole_(optics)

    Wide-field micrograph of a damaged 80 μm pinhole Natural pinholes formed by tree leaves – Solar eclipse of August 21, 2017 in Washington state. A pinhole is a small circular hole, as could be made with the point of a pin.

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