In addition, lenses can be made to correct for double vision when the eyes do not work together ("crossed eyes"). The lenses do this by moving the image to match the wayward eye. Corrective lenses, then, are prescribed to correct for aberrations, to adjust the focal point onto the retin...
Zoom lenses that work this way are known as optical zooms. Digital zooms, in digital cameras, mimic the same process using computer software, effectively scaling up a smaller part of the original image (when they zoom in) or using a bigger part of that image (when they zoom out). Unlike...
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The molecules in photochromic technology work by reacting to UV light. However, temperature can have an effect on the reaction time of the molecules. When the lenses become cold the molecules begin to move slowly. This means that it will take somewhat longer for the lenses to adapt from dark...
Getting a good image requires a suitable work space. In some ways, the requirements for this space are more stringent than the requirements for your equipment. The darker the room is, the better. A good option for adding a little light to the room without affecting the finished hologram is...
Now that we know the premise at work in HVD technology, let's take a look at the structure of the Optware disc. The Holographic Versatile Disc HVD optical pickup Courtesy Optware Holographic memory has been around for more than 40 years, but several characteristics made it difficult to im...
Camera distortionis an unavoidable part of taking pictures. High-end lenses can make lens distortion indiscernible, but the way a lens works makes a zero distortion lens impossible (at least for now). By understanding lens distortion and working with photography editing programs, you can reduce th...
non-optical surfaces of the lenses (such as flats and edges), and as a reflection off of the detector itself re-imaged back onto the detector. Modeling light reflected from the detector can be complicated by diffraction from the microstructure of the detector. Read thisapplication notethat cover...
How Do Augmented Reality Optics Work? For augmented reality to work, an optical system must project an image on a transparent display in front of your eyes to overlay the current environment. This may be in the form of a head-mounted display, handheld display (such as a digital tablet), ...
You can learn more about a camera's aperture and shutter speed in How Cameras Work. In addition to controlling the amount of light, the camera has to adjust the lenses to control how the light is focused on the sensor. In general, the lenses on digital cameras are very similar to ...