Hybrid achromatic optical lens and method for manufacturing...

Details Hybrid achromatic optical lens and method for manufacturing... Hybrid achromatic optical lens and method for manufacturing...

2007-05-22

2007-05-22

Amari, Alessandro (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S742000, C369S112030

Reexamination Certificate

active

10452207

ABSTRACT:
A hybrid achromatic optical lens having a high numerical aperture whose chromatic aberration is removed and a method for manufacturing the same are provided. The hybrid achromatic optical lens includes a first optical member of a low index of refraction and a second optical member of a high index of refraction. The second optical member is formed on a depressed portion of the first optical member and has a diffractive surface, which is a contact surface of the second optical member with the first optical member and has a plurality of pitches formed on a refractive surface. The method for manufacturing the hybrid achromatic optical lens includes forming a profile of a diffractive surface having a plurality of pitches on a molding die whose one surface is the same as a profile of a refractive surface, forming a depression having the diffractive surface on a first optical member having a low index of refraction using the molding die, and coating a material having a high index of refraction on the depression, grinding a surface of material, and forming a second optical member having a high index of refraction.

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Office Action issued by the Chinese Patent Office on May 20, 2005 in corresponding application, with English translation.
Notice to Submit Response issued by the Korean Patent Office on Jan. 11, 2005 in corresponding application.

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