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What is an aspheric lens? Correcting spherical aberration and comparing manufacturing methods
An aspheric lens is a lens whose surface has a radius of curvature that changes continuously from the center t […]
Basics
What is polarization? The direction of light vibration and its meaning in optical design
Polarization is a physical phenomenon in which the electric field of light — an electromagnetic wave — vibrate […]
What is heat-resistant resin? Definitions, test standards, and a heat-resistance comparison of major resins
The term heat-resistant resin is used every day, yet no single definition is agreed upon across the industry — […]
What is refractive index? A foundation for optical resin selection and lens design
Refractive index is a physical quantity that governs how fast light travels through a material, making it a st […]
What is water absorption? Why it shifts the dimensions and refractive index of optical resin
Plastics absorb moisture from the air or water over time, and water absorption is the metric that quantifies h […]
Difference between total luminous transmittance and haze — how to read optical resin transparency
Catalogs for transparent materials list two figures side by side: “total luminous transmittance” and “haze.” B […]
What is transparent resin? Properties by type and how to choose for optical applications
Transparent resin is a general term for plastics that transmit a high proportion of visible light. Application […]
What is Abbe number? From the basics of chromatic aberration to choosing optical materials
The Abbe number is a metric that expresses how much a lens material disperses light by wavelength. The larger […]
What Is Thermal Decomposition? Principles and Countermeasures for Optical Resins in Practice
Thermal decomposition is a chemical change in which a resin undergoes scission of its molecular chains at high […]
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