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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 ...
Lady Gaga (2021) Lady Gaga looked so good at President Biden’s inauguration that it was hard to focus on her phenomenal rendition of “The Star Spangled Banner.”
Fundus photography involves photographing the rear of an eye, also known as the fundus. Specialized fundus cameras consisting of an intricate microscope attached to a flash enabled camera are used in fundus photography. The main structures that can be visualized on a fundus photo are the central and peripheral retina, optic disc and macula.
Electric eye for a garage door opener. An electric eye is a photodetector used for detecting obstruction of a light beam. An example is the door safety system used on garage door openers that use a light transmitter and receiver at the bottom of the door to prevent closing if there is any obstruction in the way that breaks the light beam.
Crystal treads up the driveway, tears welling in her eyes as they pass over the dusty mound of rubble. Chunks of debris cover the bedroom where her mother slept for the past 55 years.
CNN host Kasie Hunt said during her show on Tuesday that the outlet needed to "drop the banner" in order to see why social media users were captivated by the alleged UnitedHealtcare CEO killer ...
Optography is the process of viewing or retrieving an optogram, an image on the retina of the eye. A belief that the eye "recorded" the last image seen before death was widespread in the late 19th and early 20th centuries, and was a frequent plot device in fiction of the time, to the extent that police photographed the victims' eyes in several ...