| 释义 |
Definition of aplanat in English: aplanatnoun ˈaplənatˈapləˌnat Physics A reflecting or refracting surface which is free from spherical aberration. Example sentencesExamples - The term ‘aplanat’ means that the lens is corrected for coma, an image aberration which Rutten and & van Venroiij discuss very well in their book.
- All six lenses are fully corrected aplanats, so they can be mixed and matched in a focusing or non-focusing configuration to obtain the desired magnification.
- The aplanat is a variation of the simple Abbe, but usually of 3 element design which furnishes a more geometrically perfect cone of light, though its chromatic aberrations are similar to the Abbe's.
- When viewing resolution is less critical, the aplanats offer an economical alternative.
- We do not know what led him to this highly successful design, but it may have been an assembly of two Grubb-type landscape aplanats about a central stop.
Derivatives adjective Physics These locations for which spherical correction has been optimized are called the aplanatic points. Example sentencesExamples - The results indicates that the aplanatic hologram lenses are feasible for optical disk applications.
- It is shown to illustrate how a useful lens can be built using the aplanatic point of a sphere despite the fact that it lies within the glass.
- We can apply the same reasoning to rods and transformation of cylindrical diverging wavefront using aplanatic points of the rods.
- The aplanatic condenser is not corrected for color, hence objectionable color fringes are produced around the field of view diaphragm.
Origin Late 19th century: coined in German from Greek aplanētos, from a- 'not' + planan 'wander'. Definition of aplanat in US English: aplanatnounˈapləˌnat Physics A reflecting or refracting surface which is free from spherical aberration. Example sentencesExamples - The aplanat is a variation of the simple Abbe, but usually of 3 element design which furnishes a more geometrically perfect cone of light, though its chromatic aberrations are similar to the Abbe's.
- When viewing resolution is less critical, the aplanats offer an economical alternative.
- All six lenses are fully corrected aplanats, so they can be mixed and matched in a focusing or non-focusing configuration to obtain the desired magnification.
- The term ‘aplanat’ means that the lens is corrected for coma, an image aberration which Rutten and & van Venroiij discuss very well in their book.
- We do not know what led him to this highly successful design, but it may have been an assembly of two Grubb-type landscape aplanats about a central stop.
Origin Late 19th century: coined in German from Greek aplanētos, from a- ‘not’ + planan ‘wander’. |