optical crown glass

ریشه

The term 'optical' refers to relating to or involving light. 'Crown glass' refers to a type of glass that was originally made by blowing a glass bubble and spinning it rapidly, causing the bubble to flatten into a disc shape with a raised crown in the center.

مثال

• The camera lens is made of optical crown glass.
• Optical crown glass is commonly used in eyeglasses.
• The high refractive index of optical crown glass allows for better focusing of light.

ترکیب‌های رایج

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