Nghĩa của từ crown glass bằng Tiếng Anh
The ‘Barlow lens ‘, a modification of this telescope lens, is a negative achromatic combination of flint glass and crown glass .’
Đặt câu với từ "crown glass"
1. Newtonians explain this by saying that the achromatic refractor's crown glass and flint glass refract light as a whole with equal intensity but disperse individual colors differently.
2. Aplanat: A system of lenses invented by Adolph Steinheil, in 1866, for use in photography, consisting of a biconvex crown-glass lens placed between two concavo-convex lenses of flint-glass.
3. The Achromatic lens consists of a double convex lens of crown glass combined with a plano-concave lens of flint glass. PHYSICS WILLIS EUGENE TOWER Achromatic lenses are used in all high-grade optical instruments such as telescopes and …