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Conceptual through-beam system to detect unauthorized access to a secure door. If the beam is interrupted, the detector triggers an alarm. A photoelectric sensor is a device used to determine the distance, absence, or presence of an object by using a light transmitter, often infrared, and a photoelectric receiver.
Catch lights in a child's eyes. Catch light or catchlight is a light source that causes a specular highlight in a subject's eye in an image; the term may also refer to the highlight itself. [1] The catch light is either an artifact for a lighting method, or purposely engineered to add a glint or spark to a subject's eye during photography. The ...
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The beauty dish is used in portrait and fashion photography, because it is the best modifier for concentrating light on a subject and creating a better image than other modifiers. Because the beauty dish wraps the light around the subject it gives the image a better contrast and highlights angles that other modifiers wouldn't be able to ...
A studio portrait, showing the characteristic illuminated triangle on the darker side of the face. Rembrandt lighting is a standard lighting technique that is used in studio portrait photography and cinematography; it is also used in contrast with butterfly lighting [1] It can be achieved using one light and a reflector, [2] or two lights, and is popular because it is capable of producing ...
A portable folding reflector positioned to "bounce" sunlight onto a model. Reflectors vary enormously in size, colour, reflectivity and portability. In tabletop still life photography, small mirrors and card stock are used extensively, both to reduce lighting contrast and create highlights on reflective subjects such as glassware and jewelry.
Klieg lights. A Klieg light is an intense carbon arc lamp especially used in filmmaking.It is named after inventor John Kliegl and his brother Anton Kliegl.Klieg lights usually have a Fresnel lens with a spherical reflector or an ellipsoidal reflector with a lens train containing two plano-convex lenses or a single step lens.
The iris (light brown region), pupil (black circle in the centre), and sclera (white surrounding area) are visible in this image, along with the eyelids and eyelashes which protect the eye. The human eye functions by focusing light onto a layer of photoreceptor cells called the retina, which forms the inner lining of the back of the eye. The ...
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