PATENT CLAIM ANALYSIS

Application Number: 16132912
Application Type: Utility
Filing Date: 2018-09
Publication Date: 2019-03
Patent Classification: ["348", "345000"]

Abstract:
An image pickup apparatus corrects defocusing caused by an aperture difference to prevent degradation in AF focusing accuracy. In the image pickup apparatus, an image shift amount is detected based on a pair of picture signals by a phase difference AF method. When a first aperture at a time of a focus detection operation for detecting an image shift amount by a focus detection unit differs from a second aperture at a time of an image shooting operation for recording an image signal acquired from an image pickup device, a correction amount of a position of a focus lens due to a difference between a first aperture and a second aperture is calculated, by using a correction amount acquired from a first storage unit and a difference in the position of the focus lens between the first aperture and the second aperture acquired from a second storage unit.

Claim (Index 5):
A method for controlling an image pickup apparatus including an image pickup device capable of photoelectrically converting a light flux having passed through mutually different pupil areas of an image pickup optical system including a focus lens to output a pair of picture signals, the method comprising:\n a focus detection step of detecting an image shift amount based on the pair of picture signals by a phase difference AF method; a diaphragm control step of controlling an aperture of a diaphragm included in the image pickup optical system; and a first storage step of storing a correction amount for correcting optical defocusing caused by an aberration of the image pickup optical system in accordance with the aperture; a second storage step of storing a difference between a position of the focus lens at which the image shift amount in the phase difference AF becomes zero for a predetermined aperture, and a position of the focus lens at which the image shift amount in the phase difference AF becomes zero for each aperture; and a calculation step of calculating, when a first aperture at a time of a focus detection operation for detecting the image shift amount by the focus detection step differs from a second aperture at a time of an image shooting operation for recording an image signal acquired from the image pickup device, the correction amount of the position of the focus lens due to a difference between the first aperture and the second aperture, by using the correction amount stored at the first storage step and the difference in the position of the focus lens between the first aperture and the second aperture stored at the second storage step.

Metadata:
- Claim Count in Document: 5.0
- Percentile: 97.0
- Lexical Diversity: 2.48387
- Patent Class: 348.0
- Transitional Phrase Type: open
- Component Type: 1
- Foreign Priority: True
- Related Applications: ['14243161', '15076794', '13475427', '14608949', '13516794']

Analysis Scores:
- 35 USC 101 Eligibility (BERT): 0.6447338797425156
- 35 USC 102 Novelty (BERT): 0.4944189185067712
- Combined Prediction Score: 0.6297023836189413
- Mean Citation Score: 252.263614
- Max Citation Score: 261.63846
- Similarity Product: 206.68773000574348

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