trắc viễn
Definition
- Noun:
- Tacheometer / Tachymeter: A surveying instrument or a type of lens used to measure distances from the observer's location to a distant point or object.
- Rangefinder lens: In optics, a lens system designed for determining the distance to an object viewed through it.
Usage Examples
- Noun:
- Nhà địa chất sử dụng trắc viễn để đo khoảng cách tới vách núi. (The geologist uses a tacheometer to measure the distance to the cliff face.)
- Ống kính trắc viễn trên máy ảnh này rất chính xác. (The rangefinder lens on this camera is very accurate.)
Advanced Usage
- The term is technical and primarily used in fields like surveying, geodesy, optics, and photography. It is not common in everyday conversation.
Variants and Related Words
- Máy trắc viễn (n): Tacheometer/theodolite (the complete instrument).
- Máy trắc viễn là thiết bị quan trọng trong trắc địa. (The tacheometer is an important device in surveying.)
Synonyms
- Rangefinder: A device for estimating distance.
- Tacheometer: A surveying instrument for measuring distances.
- Tachymeter: An instrument for rapid measurement of distance, direction, and elevation.
Notes on Usage
- "Trắc viễn" is a compound Sino-Vietnamese word (trắc = to measure, viễn = far). It is a specialized term.
- It is most accurately translated as a rangefinder in a general optical context or a tacheometer in a precise surveying context. The specific meaning depends on the technical field.