achromatic doublet造句

• In practice, the lens will be an achromatic doublet.
• Most are classical Great refractors, which used achromatic doublets on an equatorial mount.
• One more potential evolutionary issue is that the eye does not contain anything like an achromatic doublet that would prevent chromatic aberration.
• Note that these two parameters which enter into the equations for design of achromatic doublets are exactly what is plotted on an Abbe diagram.
• Despite common belief, the Tessar was not developed from the 1893 Cooke triplet design by replacing the rear element with a cemented achromatic doublet.
• Not being as reticent as Hall, Bass let others know of the lens's properties and the method of making an achromatic doublet spread.
• Dollond applied for and was granted a patent on the technology in 1758, which led to bitter fights with other opticians over the right to make and sell achromatic doublets.
• "Chromatic aberration " is caused by the achromatic doublet ( or " achromat " ) in which two materials with differing dispersion are bonded together to form a single lens.
• They may be made of one or more conventional lenses or achromatic doublets, or a long cylindrical thin lens formula with object distance s = 2f, the image distance is calculated to s'= 2f ).
• For large diameter borescopes ( over 12mm ), the achromatic doublet relays work quite well, but as the diameter of the borescope tube gets smaller the Hopkins rod lens and gradient index rod lens designs provide superior images.
• You need to pick a set with the correct thread diameter for the lens they'll be attached to, and you'll want to look for the more expensive achromatic doublet variety ( they're constructed in a way that minimizes chromatic aberration ).
• Erfles usually consist of five elements comprising two achromatic doublets, with a convex singlet element sandwiched in between,  and  are designed to have a wide field of view ( about 60 degrees ) but suffer from astigmatism and ghosting, especially in the shorter focal lengths .  Still,  Erfles remain quite popular owing to their large eye lenses and good eye relief .