eyepiece
eyepiece — noun
1. the round glass part at the top of a telescope, microscope, binoculars, or other
the round glass part at the top of a telescope, microscope, binoculars, or other optical instrument that you place your eye against to see an enlarged or clear image
Xiu adjusted the eyepiece of her microscope to see the bacteria more clearly.
collocation: adjust the eyepiece
The telescope’s eyepiece had a small scratch, so the stars looked slightly blurry.
Before each experiment, the eyepiece was checked for dust by the lab technician.
Rania told her class to look through the eyepiece without touching the glass lens.
It is important to hold the eyepiece steady while focusing the microscope.
- ocular lens
the formal technical term, more common in scientific writing than in everyday speech
- eye lens
describes the same part by function; less frequently used than 'eyepiece'
- objective lens
the lens at the opposite end of a microscope, closest to the specimen being viewed
文法句型
the eyepiece of [instrument]
用法筆記
Often paired with a specific instrument name in a prepositional phrase (e.g., 'eyepiece of the microscope'). The counterpart on the opposite end of a microscope is the objective lens.
常見錯誤
❗ 'Look at the eyepiece' (when the intended meaning is looking through it). ✅ 'Look through the eyepiece.' — 'at' suggests examining the object itself; 'through' describes using it to see something else.
❗ 'Change the eyepiece of the telescope to a stronger lens' ✅ 'Replace the eyepiece with a stronger one.' — 'change [part] of [thing] to [thing]' sounds unnatural for optical components.