object glass
- noun
- /ˈɑbdʒɛkt ɡlæs/
- Specialized
:
lente objetiva
- During the lecture, the professor explained how the object glass affects the magnification of the image.
Examples
-
He replaced the damaged object glass on the telescope to improve the image quality of the stars.
-
We got an object glass of thirty-two inches focus, which we fitted into the brass tube.
Academic text (1992) -
And it does note several object glasses and telescope mirrors in there.
-
In Munich, however, he located an object-glass ready for mounting that was the work of the well-known firm of Merz and Mahler.
Academic text (2005) -
The scientist adjusted the object glass in the microscope to get a clearer view of the cells.
Synonyms
175
2.5
A clear curved piece of glass or plastic that focuses light
5
7.0
A lens on a microscope or telescope closest to the object
1
3.9
The lens nearest the object in a microscope or telescope that makes the main image
1
4.2
A group of curved glass parts that bend light to make images, for example in cameras or microscopes
1
3.9
A system of several lenses lined up to make images clearer or larger
The curved piece of glass in a microscope or telescope nearest the object that makes the first image
A curved piece of clear glass or plastic that focuses light in cameras and microscopes
A curved piece of glass or plastic that helps you see things more clearly in instruments
Surface Forms
Morphology
The noun is compositionally formed from 'object' + 'glass' so learners can partially infer it refers to a piece of glass/lens associated with the object side of an optical instrument. However, the precise technical sense (the lens closest to the object) and the specialized use of 'glass' to mean 'lens' are domain-specific and not fully predictable for a B1 learner without exposure.
Etymology
Object glass comes from early microscopes and telescopes: the word glass meant the lens and it sat next to the object being looked at. So the name came to mean the lens 'closest to the thing you are viewing'.