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123:, giving it a specific spatial configuration and intensity profile. Diffractive diffusers are commonly used in commercially available LED illumination systems. Usually, the diffuser material is GaN or fused silica with processed rough surfaces. LED diffusers can be characterized online using scatterometry-based metrology.
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Recently, photopolymers have been used for making holographic diffusers. Photopolymers offer better performance than other materials and have a large viewing angle. Also, the process of synthesizing photopolymers is much simpler.
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99:(its brightness appears the same from any angle of view). It does not absorb light, giving back 100% of the light it receives. Reflective diffusers can be easily characterised by scatterometers.
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167:. A diffusion filter of this type may also be used in front of a non-flash studio light to soften the light on the scene being shot; such filters are used in still photography, in
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Walecki, Wojciech, and Peter
Walecki. "Robust diffuser and roughness metrology tool for LED manufacturing." SPIE OPTO. International Society for Optics and Photonics, 2015.
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209:), but rather will spread out, bounce from reflective ceilings and walls, thus getting rid of harsh light, and hard shadows. This is particularly useful for
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Silk sheets can also be used as diffusers, and in fact were until the invention of translucent plastics. "Opal" is a common translucent or
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Diffusion filters may be used to diffuse the light falling on the subject, or placed between the camera and the subject for a hazy effect.
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or shooting through a nylon stocking. Diffusion filters may be uniform or may have a clear center area to create a
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or boomerang. Placed in front of a stage light, it gives quick changes in lighting gel, including a diffusion filter
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Effects of a diffuser in close-up photography (for more information, see file description)
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Diffuser on a camera flash. Made from a sheet of paper, a rubber band, and two staples.
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A lighting technician holds a reflector to diffuse the light falling on a politician
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A perfect (reflecting) diffuser (PRD) is a theoretical perfectly white surface with
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A more formal diffuser filter over a camera flash, flanked by reflectors
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In effect, the light will not come from one concentrated source (like a
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Both transmitting (softbox) and reflecting diffusors are used to light
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Top left: original image. Bottom left: diffusion filter. Top right:
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light from a white surface, while more compact diffusers may use
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Reflecting diffusers for photography are generally called "
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426:of diffused area around the clear center subject.
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410:filter softens subjects and generates a dreamy
143:Lighting diffusers, transmitting and reflecting
267:diffuser; a larger area spreads the light more
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62:. Diffused light can be easily obtained by
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335:Studio lights, one white, two metallized
252:Flash diffuser to be mounted on a camera
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391:"Diffusion filter" may also refer to a
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111:(DOE) that exploits the principles of
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119:. It uses diffraction to manipulate
107:A diffractive diffuser is a kind of
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505:Fairchild, Mark D. (8 July 2005).
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58:light in some manner to transmit
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402:. When used in front of the
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195:are diffusing window/doors.
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187:, which is another type of
109:diffractive optical element
91:Perfect reflecting diffuser
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183:. This is by analogy to a
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29:Diffuser (disambiguation)
323:for a television program
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508:Color Appearance Models
477:Reflector (photography)
50:) is any material that
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383:effect. Bottom right:
371:Objective-lens filters
157:shoot-through diffuser
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97:Lambertian reflectance
587:Photographic lighting
577:Photography equipment
513:John Wiley & Sons
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544:www.zebraoptical.com
307:Lightbox photography
82:, and greyed glass.
70:material, including
27:For other uses, see
396:photographic filter
153:speedlight diffuser
121:monochromatic light
572:Optical components
462:Integrating sphere
457:Diffuse reflection
430:Diffuser materials
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16:(Redirected from
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467:Photon diffusion
452:Beam homogenizer
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48:optical diffuser
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18:Diffusion filter
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291:A home-made
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127:Applications
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72:ground glass
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472:Beauty dish
438:diffusion.
404:camera lens
398:used for a
393:translucent
347:Theatrical
113:diffraction
68:translucent
566:Categories
493:References
487:Soft focus
436:opalescent
200:reflectors
179:, or just
117:refraction
80:opal glass
64:reflecting
60:soft light
420:UV filter
408:diffusion
207:spotlight
185:color gel
181:diffusion
171:, and in
446:See also
424:vignette
293:lightbox
211:portrait
56:scatters
52:diffuses
40:diffuser
482:Softbox
387:effect.
321:wagashi
265:Softbox
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165:camera
76:teflon
36:optics
418:on a
364:ShÅji
193:ShÅji
163:of a
161:flash
155:, or
86:Types
517:ISBN
412:haze
406:, a
385:lomo
115:and
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54:or
46:or
34:In
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
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