Objective optics with interference filter
First Claim
1. Optical apparatus, comprising:
- an image sensor; and
an optical assembly, which has a specified numerical aperture and is configured to focus optical radiation via an aperture stop onto the image sensor, and which comprises;
a plurality of optical surfaces, consisting of a first, curved surface through which the optical radiation enters the assembly, a final surface through which the rays exit the assembly toward the image sensor, and at least two intermediate surfaces between the first and final surfaces; and
an interference filter, which has a center wavelength and a passband no greater than 4% of the center wavelength, and which comprises a coating formed on one of the optical surfaces, which is chosen and configured so that all rays of the optical radiation passing through the aperture stop are incident on the coating over a range of incidence angles with a half-width that is no greater than three fourths of the numerical aperture.
3 Assignments
0 Petitions
Accused Products
Abstract
Optical apparatus includes an image sensor and an optical assembly, which is configured to focus optical radiation via an aperture stop onto the image sensor. The optical assembly includes a plurality of optical surfaces, consisting of a first, curved surface through which the optical radiation enters the assembly, a final surface through which the rays exit the assembly toward the image sensor, and at least two intermediate surfaces between the first and final surfaces. An interference filter, which has a center wavelength and a passband no greater than 4% of the center wavelength, and includes a coating formed on one of the optical surfaces. All rays of the optical radiation passing through the aperture stop are incident on the coating over a range of incidence angles with a half-width that is no greater than three fourths of the numerical aperture of the optical assembly.
56 Citations
19 Claims
-
1. Optical apparatus, comprising:
-
an image sensor; and an optical assembly, which has a specified numerical aperture and is configured to focus optical radiation via an aperture stop onto the image sensor, and which comprises; a plurality of optical surfaces, consisting of a first, curved surface through which the optical radiation enters the assembly, a final surface through which the rays exit the assembly toward the image sensor, and at least two intermediate surfaces between the first and final surfaces; and an interference filter, which has a center wavelength and a passband no greater than 4% of the center wavelength, and which comprises a coating formed on one of the optical surfaces, which is chosen and configured so that all rays of the optical radiation passing through the aperture stop are incident on the coating over a range of incidence angles with a half-width that is no greater than three fourths of the numerical aperture. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12)
-
-
11. Optical apparatus, comprising:
-
an image sensor; and an optical assembly, which is configured to focus optical radiation onto the image sensor and which comprises; a plurality of optical surfaces, including a concave surface; and an interference filter comprising a coating formed on the concave surface.
-
-
13. Optical apparatus, comprising:
-
an image sensor; and an optical assembly, which is configured to focus optical radiation via an aperture stop onto the image sensor, and which comprises; a plurality of optical surfaces, including a curved surface having a center of curvature in a vicinity of the aperture stop; and an interference filter comprising a coating formed on the curved surface.
-
-
14. A method for producing an imaging system, comprising:
-
providing an optical assembly having a specified numerical aperture and comprising a plurality of optical surfaces, consisting of a first, curved surface through which the optical radiation enters the assembly, a final surface through which the rays exit the assembly, and at least two intermediate surfaces between the first and final surfaces; configuring the optical assembly to focus optical radiation via an aperture stop onto an image sensor; and filtering the optical radiation using an interference filter, which has a center wavelength and a passband no greater than 4% of the center wavelength, and which comprises a coating formed on one of the optical surfaces, which is chosen and configured so that all rays of the optical radiation passing through the aperture stop are incident on the coating over a range of incidence angles with a half-width that is no greater than three fourths of the numerical aperture. - View Dependent Claims (15, 16, 17, 18, 19)
-
Specification