objective lens
1
3.9
- noun
- /əbˈdʒɛktɪv lɛnz/
- Specialized
:
lente objetiva
- The scientist observed the cellular structures through the objective lens of her microscope.
- aperture of the objective lens
- focus of the objective lens
Examples
-
The point of illumination in the specimen is brought into focus by the objective lens and laterally scanned with a device under computer control.
Academic text (2004) -
As noted earlier, the spot size is inversely proportional to the NA of the objective lens, but the depth of focus of the objective lens is inversely proportional to the square of the NA.
Academic text (1996) -
The moving mass can be further reduced by removing the mechanism for fine tracking from the objective lens.
Academic text (1996) -
The depth of focus defines the accuracy with which the objective lens position must be maintained with respect to the disk surface.
Academic text (1996) -
An objective lens is used to focus the laser beam to a diffraction-limited spot on the media.
Academic text (1996) -
The objective lens also acts as a collector lens for the light that is reflected from the disk.
Academic text (1996) -
Images were acquired with a 63x (oil) objective lens.
Academic text (2018) -
As described earlier, the objective lens was moved axially with the disk for focusing, and moved radially for fine tracking.
Academic text (1996) -
The beam of light incident on the objective lens usually has a Gaussian electric field (or irradiance) profile.
Academic text (1996) -
As servo systems and actuators become more sophisticated, the use of objective lenses with numerical apertures greater than the present 0.55 becomes more feasible.
Academic text (1996)
Synonyms
5
7.0
A lens on a microscope or telescope closest to the object
The curved piece of glass in a microscope or telescope nearest the object that makes the first image
The lens in a microscope or telescope nearest the thing you look at
How Focused
- Specialized
1
9.9
- Specialized
- Specialized
1
3.9
175
2.5
- Specialized
1
5.3
Surface Forms
Morphology
The phrase is a straightforward noun–noun compound: 'objective' (the lens nearest the object) + 'lens' (optical device), so the meaning 'the lens closest to the object that forms the primary image' is directly derivable from the parts. This compositional, technical term follows common cross-linguistic patterns (e.g., Spanish/French cognates), so a B1 learner who knows both constituents will understand it.
Etymology
Objective lens gets its name from objective meaning the 'object' being looked at and lens meaning the glass that looks at it. This lens is closest to the object and makes the first image you see through a microscope or telescope, so the name shows its job.