PATENT CLAIM ANALYSIS

Application Number: 15962427
Application Type: Utility
Filing Date: 2018-04
Publication Date: 2019-02
Patent Classification: ["359", "691000"]

Abstract:
The present invention provides a zoom lens that can perform favorable correction of chromatic aberration in the entire zoom range, and can have higher performance and a smaller size than conventional ones; and an imaging apparatus including the zoom lens. To achieve the object, provided are a zoom lens and an imaging apparatus including the zoom lens. The zoom lens includes, in order from an object side: a positive first lens group G 1 ; a negative second lens group G 2 ; and a GR group including one or more lens groups. In the zoom lens, changing focal length is performed by varying intervals between the lens groups. The GR group has at least two cemented surfaces having negative refractive power, convex lenses GpH and GpL satisfying predetermined conditional expressions. An aperture stop is arranged in the first lens group or after. The zoom lens satisfies predetermined conditional expressions.

Claim (Index 1):
A zoom lens comprising, in order from an object side:\n a first lens group having positive refractive power; a second lens group having negative refractive power; and a GR group including one or more lens groups, wherein changing focal length is performed by varying intervals between the lens groups, and wherein the second lens group moves toward the object during changing focal length from the wide angle end to the telephoto end, the GR group includes at least two cemented surfaces having negative refractive power, one or more convex lens GpH satisfying the following conditional expressions (1) and (2), and one or more convex lens GpL satisfying the following conditional expression (3), an aperture stop arranged in the first lens group or after, and wherein the following conditional expressions (4) and (5) are satisfied:\n 1.80<ndpH<2.50\u2003\u2003(1) \n 10.0<vdpH<35.0\u2003\u2003(2) \n 60.0<vdpL<100.0\u2003\u2003(3) \n 1.00<hGpH/hStop<2.00\u2003\u2003(4) \n 0.90< f 1/ fw< 6.75\u2003\u2003(5) \n wherein ndpH is a refractive index related to a d-line of the convex lens GpH, vdpH is an Abbe constant related to the d-line of the convex lens GpH, vdpL is an Abbe constant related to a d-line of the convex lens GpL, hGpH is a maximum height from an optical axis when on-axis luminous flux passes through a surface of the convex lens GpH on the object side, at the telephoto end of the zoom lens, hStop is a maximum height from an optical axis when on-axis luminous flux passes through the aperture stop, at the telephoto end of the zoom lens, f1 is a focal length of the first lens group, and fw is a focal length of the zoom lens at the wide angle end.

Metadata:
- Claim Count in Document: 9.0
- Percentile: 91.0
- Lexical Diversity: 1.8022
- Patent Class: 359.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['15962509', '14283680', '14984286', '14284630', '14100617']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.8348466839091027
- 35 USC 102 Novelty (BERT): 0.6424433737047102
- Combined Prediction Score: 0.8156063528886633
- Mean Citation Score: 494.84866
- Max Citation Score: 637.9988
- Similarity Product: 598.6701427932977

Labels:
- Claim Label 101: 1
- Claim Label 102: 0
- Claim Label 103: 1
- Claim Label 112: 1
- Combined Label: 0
- Label 101 Adjusted: 1

Dataset: test