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Examination using side (oblique) lighting: as a general rule, all items should be examined using side lighting. This is important because visual examination may detect deep indentations even though the EDD may fail to develop those indentations properly.
Alternate light source is the use of a bright white light, such as a flashlight, to better see dusty prints on the ground that may not otherwise be visible to the eye. An alternate light source is usually used by applying oblique lighting to an area of floor to more easily locate footprints to be lifted. [1]
By making the off-axis illumination (i.e., the light is illuminating the mask at an oblique angle), all the diffraction orders from the mask are tilted, which makes it more likely that the higher diffraction orders can make it through the projection lens and help form the image of the mask onto the wafer.
Common types of photography such as creative and artistic photography give a different purpose than forensic photography. Crime scene photography allows one to capture essential aspects of the crime scene, including its scope, the focal points of the scene, and any physical or material evidence found at or from a result of it. [5]
The Crime-lite is a handheld, high-intensity alternative light source used primarily by forensic investigators [1] to detect evidence such as fingerprints, bodily fluids and latent evidence from crime scenes. The Crime-lite was one of the first commercially available alternative light sources to benefit from LED technology.
The Polilight is a portable, high-intensity, filtered light source used by forensic scientists and others to detect fingerprints, bodily fluids and other evidence from crime scenes and other places.
Photographic lighting refers to how a light source, artificial or natural, illuminates the scene or subject that is photographed; put simply, it is lighting in regards to photography. Photographers can manipulate the positioning and the quality of a light source to create visual effects , potentially changing aspects of the photograph such as ...
Light incident on the sensor at normal incident produces a stronger signal than light hitting it at an oblique angle. Most digital cameras use built-in image processing to compensate for optical vignetting and pixel vignetting when converting raw sensor data to standard image formats such as JPEG or TIFF .