The filter rack flips up and out of the way while still blocking extraneous light
, enabling you to better enjoy the view through telescopes and binoculars.
The researchers created a mathematical model to help program these devices so that the camera and its light source work together efficiently, eliminating extraneous light
, or "noise," that would otherwise wash out the signals needed to detect a scene's contours.
, otherwise known as glare, is the greatest source of eyestrain to computer users.
The quality and efficiency of light sources can be evaluated in dark room with the area about 30..50 [m.sup.2] without extraneous light
sources and performing simple measurements using lux meter.
This cuts out most of the extraneous light
from distant street lights that would otherwise get into the 'scope.
* A more robust mechanical design, the new nylon frame features wide side temples and a shelf along the top edge of the frames, which help prevent extraneous light
from entering the glasses, reducing internal lens reflections.- TradeArabia News Service
A sheet of greaseproof paper between each item will help to block extraneous light
and prevent transfer of dyes without trapping moisture.
This process of suppressing extraneous light
is complex, expensive and only partially effective: even after decades of refinements, the best filters are not 100% percent successful at blocking the bleed through of non-specific photons.
In this way a viewer sees the beams from all the pixel-HOEs simultaneously, but an advantage is that only 1% or less of extraneous light
is passed through the screen.
Specimens were imaged at night to minimize extraneous light
. Conventional illumination was used, with the iris diaphragm fully constricted to provide maximum depth of field, to position and focus the image, after which the blacklights were switched on and all other sources of illumination (except computer monitor which was turned away from the microscope) were switched off.
Its very functional integral sunshade slides forward and locks in place and a collapsing rubber eyecup blocks out extraneous light
. The eyecup is even vented so it doesn't suck out your eyeball.
A lot of work is put into painting certain parts of the simulators black and hanging down curtains to keep out extraneous light