Optical lens

Patent metadata

Field	Value
Publication number	US-9645365-B2
Application number	US-201414541150-A
Country	US
Kind code	B2
Filing date	Nov 14, 2014
Priority date	Jul 27, 2012
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

An optical lens includes a first lens group and a second lens group. The first lens group is disposed between a magnified side and a minified side and has a negative refractive power. The second lens group is disposed between the first lens group and the minified side and has a positive refractive power. The optical lens is capable of forming an image at the magnified side. F/H>0.52, where F is an effective focal length, and H is an image height. A viewing angle is greater than 116.7 degrees.

First claim

What is claimed is:

1. An optical lens comprising:
a first lens group disposed between a magnified side and a minified side, the first lens group having a negative refractive power; and
a second lens group disposed between the first lens group and the minified side, the second lens group having a positive refractive power,
wherein the optical lens is capable of forming an image at the magnified side, wherein F/H>0.52, F is an effective focal length, and H is an image height, wherein a viewing angle is greater than 116.7 degrees, and wherein only one of intervals among all lenses of the optical lens has a variable length along an optical axis of the optical lens.

2. The optical lens as recited in claim 1 , wherein the first lens group comprises a first lens, a second lens, and a third lens sequentially arranged from the magnified side to the minified side, a refractive power of the first lens, a refractive power of the second lens, and a refractive power of the third lens are sequentially negative, negative, and negative from the magnified side to the minified side, the first lens is an aspheric lens, the second lens group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens sequentially arranged from the magnified side to the minified side, a refractive power of the fourth lens, a refractive power of the fifth lens, a refractive power of the sixth lens, a refractive power of the seventh lens, a refractive power of the eighth lens, a refractive power of the ninth lens, and a refractive power of the tenth lens are sequentially positive, positive, positive, negative, positive, negative, and positive from the magnified side to the minified side.

3. The optical lens as recited in claim 2 , wherein each of the first lens, the second lens, and the ninth lens is a convex-concave lens with a convex surface facing the magnified side, each of the third lens and the seventh lens is a biconcave lens, the fourth lens is a concave-convex lens with a convex surface facing the minified side, and each of the fifth lens, the sixth lens, the eighth lens, and the tenth lens is a biconvex lens.

4. The optical lens as recited in claim 2 , wherein the second lens is an aspheric lens.

5. The optical lens as recited in claim 2 , wherein each of the first lens, the second lens, and the ninth lens is a convex-concave lens with a convex surface facing the magnified side, each of the third lens and the seventh lens is a biconcave lens, each of the fourth lens, the fifth lens, the sixth lens, and the tenth lens is a biconvex lens, and the eighth lens is a concave-convex lens with a convex surface facing the magnified side.

6. The optical lens as recited in claim 2 , wherein the tenth lens is an aspheric lens.

7. The optical lens as recited in claim 2 , wherein the sixth lens, the seventh lens, and the eighth lens together form a triple cemented lens, and the ninth lens and the tenth lens together form a double cemented lens.

8. The optical lens as recited in claim 1 , wherein the first lens group comprises a first lens, a second lens, and a third lens sequentially arranged from the magnified side to the minified side, a refractive power of the first lens, a refractive power of the second lens, and a refractive power of the third lens are sequentially negative, negative, and negative from the magnified side to the minified side, the first lens is an aspheric lens, the second lens group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, a tenth lens, an eleventh lens, and a twelfth lens sequentially arranged from the magnified side to the minified side, a refractive power of the fourth lens, a refractive power of the fifth lens, a refractive power of the sixth lens, a refractive power of the seventh lens, a refractive power of the eighth lens, a refractive power of the ninth lens, a refractive power of the tenth lens, a refractive power of the eleventh lens, and a refractive power of the twelfth lens are sequentially positive, positive, negative, positive, positive, negative, positive, negative, and positive from the magnified side to the minified side.

9. The optical lens as recited in claim 8 , wherein each of the first lens, the second lens, the sixth lens, and the eleventh lens is a convex-concave lens with a convex surface facing the magnified side, each of the third lens and the ninth lens is a biconcave lens, each of the fourth lens, the fifth lens, the eighth lens, the tenth lens, and the twelfth lens is a biconvex lens, and the seventh lens is a concave-convex lens with a convex surface facing the magnified side.

10. The optical lens as recited in claim 8 , wherein the eighth lens, the ninth lens, and the tenth lens together form a triple cemented lens, and the eleventh lens and the twelfth lens together form a double cemented lens.

11. The optical lens as recited in claim 1 , wherein an effective focal length of the optical lens is f, an effective focal length of the first lens group is f 1 , an effective focal length of the second lens group is f 2 , and the optical lens satisfies 0.515<|f 1 /f|<1.299 and 2.313<|f 2 /f|<5.724.

12. The optical lens as recited in claim 1 , wherein the first lens group comprises a first lens, a second lens, a third lens, and a fourth lens sequentially arranged from the magnified side to the minified side, a refractive power of the first lens, a refractive power of the second lens, a refractive power of the third lens, and a refractive power of the fourth lens are sequentially negative, negative, negative, and positive from the magnified side to the minified side, the first lens is an aspheric lens, the second lens group comprises a fifth lens, a sixth lens, a seventh lens, an eighth lens, a ninth lens, and a tenth lens sequentially arranged from the magnified side to the minified side, a refractive power of the fifth lens, a refractive power of the sixth lens, a refractive power of the seventh lens, a refractive power of the eighth lens, a refractive power of the ninth lens, and a refractive power of the tenth lens are sequentially positive, positive, negative, positive, negative, and positive from the magnified side to the minified side.

13. The optical lens as recited in claim 12 , wherein each of the first lens, the second lens, and the ninth lens is a convex-concave lens with a convex surface facing the magnified side, each of the third lens and the seventh lens is a biconcave lens, the fourth lens is a concave-convex lens with a convex surface facing the minified side, and each of the fifth lens, the sixth lens, the eighth lens, and the tenth lens is a biconvex lens.

14. The optical lens as recited in claim 12 , wherein the sixth lens, the seventh lens, and the eighth lens together form a triple cemented lens, and the ninth lens and the tenth lens together form a double cemented lens.

15. The optical lens as recited in claim 1 , wherein the first lens group comprises a first lens, a second lens, and a third lens sequentially arranged from the magnified side to the minified side, a refractive power of the first lens, a refractive power of the second lens, and a refractive power of the third lens are sequentially negative, negative, and negative from the magnified side to the minified side, the first lens is an aspheric lens, the second lens group comprises a fourth lens, a fifth lens, a sixth lens, a seventh lens, an eighth lens, and a ninth lens sequentially arranged from the magnified side to the minified side, a refractive power of the fourth lens, a refractive power of the fifth lens, a refractive power of the six

Assignees

• Young Optics Inc

Inventors

• Chou Yu-Hung
• Lin Ying-Hsiu
• Su Yuan-Hung
• Li Shiu-Sheng

Classifications

• G02B13/16

  for use in conjunction with image converters or intensifiers {, or for use with projectors, e.g. objectives for projection TV} · CPC title

• G03B27/32

  Projection printing apparatus, e.g. enlarger, copying camera · CPC title

• G02B13/18 Primary

  with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)} · CPC title

• G02B9/04

  having two components only · CPC title