object-lens
Definition
- Noun:
- Optical component: In microscopy or optical instruments, an "object-lens" (also known as an objective lens) is the lens or system of lenses closest to the specimen or object being observed. It gathers light from the object and forms a real, magnified image.
- Medical usage: In medicine, particularly in microscopy, the "object-lens" refers to the lens that is positioned directly over the specimen slide to produce a clear, enlarged image for examination.
Usage Examples
- Noun:
- The object-lens of the microscope must be cleaned carefully to avoid blurring the image. (The lens nearest the specimen is crucial for image clarity.)
- A high-quality object-lens allows for better resolution of cellular structures. (The objective lens improves detail in medical or biological observations.)
Advanced Usage
- "object-lens adjustment": the process of calibrating the objective lens to focus on a specimen.
- After placing the slide, the technician made a fine object-lens adjustment to bring the cells into sharp focus. (Adjusting the lens for optimal viewing.)
Variants and Related Words
Objective lens (n): a synonym for "object-lens", more commonly used in modern optics.
- The objective lens on this microscope has a magnification of 40x. (The primary lens for viewing the specimen.)
Eyepiece lens (n): the lens through which the user looks, opposite the object-lens.
- The eyepiece lens works together with the object-lens to create the final magnified image. (The lens at the top of the microscope.)
Synonyms
- Objective: the standard term in microscopy for the lens closest to the object.
- Front lens: a less common term referring to the lens nearest the specimen in certain optical systems.
Related Idioms