定义
English Expression
absorbance
Definition
See absorptance, absorption efficience
标签： X
吸收系数
定义
描述物质（内部）吸光率的一个指标。如果该物质的单位透射量是 t，吸收系数（a）就是：
a = 1 – t
English Expresstion
absorption coefficient
Definition
An indicator of a material’s internal absorptance. If the unit transmission of the material is t, the absorption coefficient (a) is:
a = 1 – t
吸收比
定义
吸收光辐射或光通量与入射光辐射或光通量的比。
English Expression
absorptance
Definition
Ratio of the absorbed radiant or luminous flux to the incident flux.
消融阈值
0
定义
吸收的激光能量刚好足以破坏物质分子之间的连接的能量值。
English Expression
ablation threshold
Definition
The point at which absorbed laser energy is sufficient to break the bonds between molecules of a material.
像差感应器
定义
一种采用刀（刃）扫描技术的光学仪器，可以检测和测量光学系统里畸变。
English Expression
Aberration sensor
Definition
An optical instrument with knife-edge scanning technology that can detect and measure aberrations in an optical system.
像差
定义
偏离正规的，正确的或自然的。在光学里，由于透镜系统的缺陷导致光学成像偏离近轴成像规则，称为像差。
English Expression
Aberration
Definition
Deviation from what is normal, right or natural. In optics, defects of a lens system that cause its image to deviate from the rules of paraxial imagery.
斜球面像差
定义：
一种成像时形成的对称弥散光斑的中心不在透镜光轴上的像差。当图像从场中心离开时，弥散光斑随之增大，慢慢形成彗差。也称为离轴球面像差。
English Expression：
abaxial spherical aberration
Definition:
A type of aberration in which a symmetrical light patch is formed at points that do not lie on the lens axis. When the image moves away from the center of the field, the patch increases in size, aiding in the formation of coma. Also known as abaxial spherical aberration.