Claims
- 1. An optical apparatus having a focus adjusting function, comprising:
- a) focus detecting means for executing a focus detection operation for each of a plurality of focus areas set in an image plane;
- b) grouping means for grouping the image plane in accordance with a distribution of defocus amounts or distances obtained from focus detection results of the plurality of focus areas by said focus detecting means;
- c) focus area selecting means for selecting at least one focus area from the plurality of focus areas in accordance with a grouping result by said grouping means;
- d) defocus amount comparing means for comparing a defocus amount of the focus area selected by said focus area selecting means with a predetermined defocus amount;
- e) lens driving means for driving a lens until the selected focus area is made in-focus, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is smaller than the predetermined defocus amount; and
- f) focus area re-selecting means for re-selecting a focus area by driving the lens in accordance with the defocus amount of the selected focus area and thereafter again operating said focus detecting means, said grouping means, and said focus area selecting means, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is larger than the predetermined defocus amount.
- 2. An optical apparatus having a focus adjusting function, comprising:
- a) focus detecting means for executing a focus detection operation for each of a plurality of focus areas set in an image plane;
- b) grouping means for grouping the image plane in accordance with a distribution of defocus amounts or distances obtained from focus detection results of the plurality of focus areas by said focus detecting means;
- c) focus area selecting means for selecting at least one focus area from the plurality of focus areas in accordance with a grouping result by said grouping means;
- d) defocus amount comparing means for comparing a defocus amount of the focus area selected by said focus area selecting means with a predetermined defocus amount;
- e) lens driving means for driving a lens until the selected focus area is made in-focus, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is smaller than the predetermined defocus amount; and
- f) focus area re-selecting means for re-selecting at least one focus area from the plurality of focus areas by driving the lens in accordance with the defocus amount of the selected focus area and thereafter again referring to a grouping result by said grouping means, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is larger than the predetermined defocus amount.
- 3. An optical apparatus having a focus adjusting function, comprising:
- a) focus detecting means for executing a focus detection operation for each of a plurality of focus areas set in an image plane;
- b) focus area selecting means for selecting at least one focus area from the plurality of focus areas;
- c) defocus amount comparing means for comparing a defocus amount of the focus area selected by said focus area selecting means with a predetermined defocus amount;
- d) lens driving means for driving a lens until the selected focus area is made in-focus, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is smaller than the predetermined defocus amount; and
- e) focus area re-selecting means for re-selecting at least one focus area from the plurality of focus areas after driving the lens in accordance with the defocus amount of the selected focus area, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is larger than the predetermined defocus amount.
- 4. A focus adjustment control circuit comprising:
- a) focus detecting means for executing a focus detection operation for each of a plurality of focus areas set in an image plane;
- b) grouping means for grouping the image plane in accordance with a distribution of defocus amounts or distances obtained from focus detection results of the plurality of focus areas by said focus detecting means;
- c) focus area selecting means for selecting at least one focus area from the plurality of focus areas in accordance with a grouping result by said grouping means;
- d) defocus amount comparing means for comparing a defocus amount of the focus area selected by said focus area selecting means with a predetermined defocus amount;
- e) lens driving signal outputting means for outputting a signal which drives a lens until the selected focus area is made in-focus, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is smaller than the predetermined defocus amount; and
- f) focus area re-selecting means for re-selecting a focus area by outputting a signal which drives the lens in accordance with the defocus amount of the selected focus area and thereafter again operating said focus detecting means, said grouping means, and said focus area selecting means, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is larger than the predetermined defocus amount.
- 5. A focus adjustment control circuit comprising:
- a) focus detecting means for executing a focus detection operation for each of a plurality of focus areas set in an image plane;
- b) grouping means for grouping the image plane in accordance with a distribution of defocus amounts or distances obtained from focus detection results of the plurality of focus areas by said focus detecting means;
- c) focus area selecting means for selecting at least one focus area from the plurality of focus areas in accordance with a grouping result by said grouping means;
- d) defocus amount comparing means for comparing a defocus amount of the focus area selected by said focus area selecting means with a predetermined defocus amount;
- e) lens driving signal outputting means for outputting a signal which drives a lens until the selected focus area is made in-focus, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is smaller than the predetermined defocus amount; and
- f) focus area re-selecting means for re-selecting at least one focus area from the plurality of focus areas by outputting a signal which drives the lens in accordance with the defocus amount of the selected focus area and thereafter again referring to a grouping result by said grouping means, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is larger than the predetermined defocus amount.
- 6. A focus adjustment control circuit comprising:
- a) focus detecting means for executing a focus detection operation for each of a plurality of focus areas set in an image plane;
- b) focus area selecting means for selecting at least one focus area from the plurality of focus areas;
- c) defocus amount comparing means for comparing a defocus amount of the focus area selected by said focus area selecting means with a predetermined defocus amount;
- d) lens driving signal outputting means for outputting a signal which drives a lens until the selected focus area is made in-focus, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is smaller than the predetermined defocus amount; and
- e) focus area re-selecting means for re-selecting at least one focus area from the plurality of focus areas after outputting a signal which drives the lens in accordance with the defocus amount of the selected focus area, if a comparison result by said defocus amount comparing means shows that the defocus amount of the selected focus area is larger than the predetermined defocus amount.
Priority Claims (2)
Number |
Date |
Country |
Kind |
9-365959 |
Dec 1997 |
JPX |
|
9-366898 |
Dec 1997 |
JPX |
|
Parent Case Info
This application is a division of application Ser. No. 09/217,552 filed Dec. 21, 1998.
US Referenced Citations (22)
Foreign Referenced Citations (6)
Number |
Date |
Country |
7-134237 |
May 1995 |
JPX |
7-134238 |
May 1995 |
JPX |
8-286253 |
Nov 1996 |
JPX |
9-127405 |
May 1997 |
JPX |
9-211316 |
Aug 1997 |
JPX |
10-161013 |
Jun 1998 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
217552 |
Dec 1998 |
|