optical crown

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Word: Optical Crown

Part of Speech: Noun

Definition: An "optical crown" refers to a type of glass that has low dispersion and low refractive index. In simpler terms, it is a special kind of glass used in making lenses (like those in glasses or cameras) that helps to reduce the distortion of colors and provides clear images.

Usage Instructions:

• The term "optical crown" is primarily used in fields like optics, photography, and lens manufacturing.
• It is not commonly used in everyday conversation, but you might encounter it in discussions about photography, vision correction, or scientific equipment.

Example:

• "The photographer decided to buy an optical crown lens to improve the clarity of his images."

Advanced Usage:

• In advanced settings, you might discuss how optical crown glass is used in specific types of lenses, such as in microscopes or telescopes, where clarity and precision are critical.

Word Variants:

• Optical (adjective): Relating to sight or the science of optics.
• Crown glass (noun): A type of high-quality glass used in windows and lenses.

Different Meanings:

• The term "crown" can also refer to a royal headpiece or signify achievement (like a crown in a competition), but in the term "optical crown," it specifically relates to glass.

Synonyms:

• Crown glass (when referring to a similar type of glass)
• Low-dispersion glass (describing its properties)

Idioms and Phrasal Verbs:

• There are no specific idioms or phrasal verbs associated with "optical crown." However, you might encounter phrases like "clear as glass" when discussing clarity in optics.

Summary:

The "optical crown" is an important term in the field of optics, referring to a special type of glass that enhances visual clarity. It is mostly used by professionals in photography, science, and related areas.

Academic

Noun

1. optical glass of low dispersion and low refractive index

Synonyms

• crown glass
• optical crown glass