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Eidoloscope
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Eidoloscope

A projector or image projector is an optical device that projects an image (or moving images) onto a surface, commonly a projection screen. Most projectors create an image by shining a light through a small transparent lens, but some newer types of projectors can project the image directly, by using lasers. A virtual retinal display, or retinal projector, is a projector that projects an image directly on the retina instead of using an external projection screen.

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Fixed Pattern Noise
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Fixed Pattern Noise

FPN can be a major issue in digital imaging, as it can detract from the quality and accuracy of images. It is especially problematic in low-light conditions.

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CCD
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CCD

The basic structure of a CCD sensor consists of a grid of tiny light-sensitive elements, called pixels. Each pixel contains a small capacitor that can store an electrical charge. When light strikes the surface of the sensor, it causes electrons to be released, which are then collected by the capacitors in each pixel.

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Camera Obscura
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Camera Obscura

A camera obscura is a darkened room with a small hole or lens at one side through which an image is projected onto a wall or table opposite the hole. Camera obscura can also refer to analogous constructions such as a box or tent in which an exterior image is projected inside.

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