coarse focus

USAGE SUMMARY

The phrase "coarse focus" is correct and usable in written English.
It is typically used in the context of microscopes or optical devices to refer to the adjustment mechanism that allows for quick and rough focusing of an image. Example: "To get a clearer view of the specimen, first use the coarse focus to bring it into general view before switching to the fine focus for precise adjustments."

✓ Grammatically correct

Wiki

Science

News & Media

Human-verified examples from authoritative sources

Exact Expressions

2 human-written examples

Twist the coarse focus knob the opposite way as you had before, so the stage moves away from the lens.

WikiHow

Twist the coarse focus knob (the large one) on the side of the base so the stage moves upward toward the short objective lens.

WikiHow

Human-verified similar examples from authoritative sources

Similar Expressions

58 human-written examples

Fig. 7 a Coarse range focused data before residual RCM correction.

EURASIP Journal on Advances in Signal Processing

After range compression and LRCMC, a coarse range focusing signal s ′ τ,t) is obtained.

EURASIP Journal on Advances in Signal Processing

The fine (resp. coarse) granularity focuses on composing sub-Spark (resp. Spark) applications to build a more complex one.

Future Generation Computer Systems

For example, when two dominant targets are located in the scene, the signal after coarse range focusing is shown in Fig. 6.

EURASIP Journal on Advances in Signal Processing

One has to be aware that post-operative suture granulomas may appear sonographically as hypoechoic nodules with coarse echogenic foci casting posterior acoustic shadowing in the thyroid bed (Fig. 19).

Cancer Imaging

A method for focusing the microscope, usually with coarse and fine focusing controls, must also be provided.

Encyclopedia Britannica

Coarse adjustment in focus was guided by image quality of the UHR-AO-OCT image displayed in real time on the computer monitor.

Biomedical Optics Express

This approach is necessary because all available data are needed right from the start to enable the user to switch rapidly between a coarse overview and focus of arbitrary details.

Bioinformatics

A froth of sweet-hot horseradish oil on the side makes an effective foil for the suave flavors and textures of avocado and salmon, and a sprinkling of coarse salt sharpens the focus and adds the all-important sensation of crunch.

The New York Times - Food

Expert writing Tips

Best practice

When using a microscope, always begin with the "coarse focus" knob to quickly bring the specimen into view, then switch to the fine focus for detailed adjustments.

Common error

Avoid using only the "coarse focus" for prolonged viewing. It can distort the image and miss fine details. Always refine with the fine focus knob.

Linguistic Context

The phrase "coarse focus" functions primarily as a noun phrase, often used to describe a feature or adjustment on optical instruments like microscopes. Ludwig AI confirms its correctness and usability in written English.

Expression frequency: Rare

Frequent in

Science

50%

Wiki

50%

News & Media

0%

Less common in

Formal & Business

0%

Encyclopedias

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Reference

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Ludwig's WRAP-UP

The phrase "coarse focus" is a noun phrase mainly used within scientific and technical contexts, particularly in discussions related to microscopy and optics. Ludwig AI indicates that the phrase is correct and acceptable. As the examples show, the term refers to the initial, rough adjustment used to bring an image into approximate focus. Related terms include "rough focus" and "initial focus". A key writing tip is to avoid over-reliance on "coarse focus" and always refine with fine focus for optimal clarity.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

rough focus

This alternative emphasizes the lack of precision in the focusing process.

initial focus

This suggests that it's the first step in a more detailed focusing procedure.

approximate focus

This highlights the inexact nature of the focus achieved.

basic focus

This implies the fundamental or essential level of focus.

preliminary focus

This indicates that it's a focus setting done in advance of a more precise one.

general focus

This suggests a broad, rather than detailed, area of focus.

broad focus

Emphasizes the scope of what is in focus, rather than the precision.

overall focus

This refers to the focus on the entirety of the image, not specific details.

crude focus

Highlights the rudimentary nature of the focusing mechanism.

primary focus

Indicates the main element being brought into focus initially.

FAQs

How is "coarse focus" used in microscopy?

In microscopy, "coarse focus" refers to the initial, larger adjustment used to quickly bring a specimen into approximate focus. It's followed by fine focus for precise clarity.

What's the difference between "coarse focus" and fine focus?

"Coarse focus" provides a large, rapid adjustment for initial focusing, while fine focus offers smaller, more precise adjustments for optimal image clarity.

Can I use "rough focus" instead of "coarse focus"?

Yes, "rough focus" is a suitable alternative to "coarse focus", especially when describing an initial, imprecise adjustment.

In what contexts is "coarse focus" typically used?

"Coarse focus" is primarily used in technical contexts related to optical instruments like microscopes, where it describes a specific focusing mechanism.