objective lens


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objective lens

a lens that accepts light from the output phosphor of a radiographic image-intensifier tube and converts the light into a parallel beam for recording an image on film.
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The research report offers an in-depth analysis of the Africa objective lens market by providing the past performance and projected figures concerning the key countries in this region.
We would have liked to have seen a little more resistance on the adjustable eye cups and better objective lens caps, but all in all, they are a heck of a buy.
There is the problem of lateral chromatic aberration due to the wedge at the outer rim of the objective lens, but this has been reduced to a minimum by having a very long focal length.
NA: The higher numerical aperture of the objective lens, the smaller diameter of the beam spot focused on a disc surface.
In the past, excitation light coming from the condenser lens and going through the objective lens could not be completely blocked by the emission filter, leading to a high background signal.
In addition to the larger objective lens, some binoculars, used predominantly for low-light observations, have a special chemical coating that enhances efficiency by partially preventing collected light from escaping.
While the substrate protects the recording layer from contamination and oxidation, the thickness of the substrate also limits the numerical aperture (na) that can be used in the objective lens.
A universal eyepiece assembly is used with a short objective lens or a slide-on objective sleeve, the working length can be increased with extensions, and a camera adapter can be attached for video inspection of castings.
This discussion was then used to explain the objective lens and light-gathering ability of binoculars.
Featuring a bright field of view, rubber coating and JIS Class 6 waterproof construction, this PENTAX spotting scope uses a 63mm compact objective lens and offers increased mobility by making the eyepiece integrated with the body.
I WISH I COULD TAKE A SURVEY to find out what percentage of our readers have been told to buy a scope with the biggest objective lens possible because "it gathers more light.
The maintube is 30mm in diameter, and the objective lens is 42mm in diameter.

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