The eccentricity of a cemented lens refers to the misalignment between the optical axis and the geometric center axis of the lens. The amount of eccentricity is usually expressed in angles, such as 30 seconds (30″) or 1 minute (1′). The main difference between the two lies in their impact on the performance of the optical system.
Difference between 30" and 1' Eccentricity
Angular Difference:
Impact on Aberrations:
Manufacturing and Testing Difficulty:
Application Scenarios:
Summary
Lenses with 30″ and 1′ eccentricity exhibit significant differences in optical performance and manufacturing difficulty. Lenses with 30″ eccentricity require higher manufacturing precision and stricter quality control to ensure high performance and low aberrations in optical systems. Although lenses with 1′ eccentricity are slightly easier to manufacture, they still need to ensure a certain level of precision to meet the basic requirements of optical systems.
