microprism


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microprism

[′mī·krə‚priz·əm]
(optics)
A usually circular area in the focusing screen of a camera viewfinder that is made up of tiny prisms and causes the image in the viewfinder to blur if the subject is out of focus.
References in periodicals archive ?
All have a fixed focusing screen with a fine-matte ring around the central microprism or split-image area.
In the field of microprisms, JP2013101257A (The identification method of an optical member and this optical member, identification information reproducing apparatus, and an authentication apparatus) from synthetic products manufacturer Kuraray discloses an optical unit provided with several slopes which have the function to transmit or reflect light.
Pucker & Pout, a brush-on lip color, contains vitamins A, C and E, features SPF15 protection and contains color pigments and holographic microprisms that bend and wrap light around the contours of the wearer's lips.
The alternative strip uses glass beads instead of the microprisms and is less efficient.
SaveMed, under the full title of Microstructure secured and self-verifying medicines, is aimed at 'ensuring product pedigree and defending against illegal re-packing (by) the incorporation of diffractive gratings, random microstructures, micro-barcodes and contrast generating microprisms in steel tools.
This technology works by depositing microprisms of light-reflective, colored crystalp articles onto lashes for subtle yet striking color and luster," notes Cheryl Vitali, executive vice president and general manager of the Revlon Global Brand Equity Group.
The brush-on lipstick comes in eight shades with holographic microprisms to create luminous lips as well as vitamins A, C and E and SPF 15.
ISCENT's New Holo-Like Optical Material; Microlenses and Microprisms Patent Info; Chinese Cigarette Packaging: Technology Marries Aesthetics & Security; OpSec Announces Proposed Acquisition of Delta Labelling; Holo-Microscopy of Neurons; Stockwatch: Markets Stable Despite Worrying European Growth and Unemployment Figures; GIA Predicts $17bn Holography Market by 2017.
In the field of OVDs, several documents relate to the use of microlenses, microprisms and reliefs in order to give optical and motion effects.
As the graph shows, most of the 2011 patents cover security optical effects, primarily for microlenses or microprisms.
It comprises microprisms embossed into the substrate in an array of both one- and two-dimensional structures.