JP2002341221A - Method for positioning imaging device and lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily set a lens at a specific position about an imaging device. SOLUTION: The imaging surface of the imaging device placed on an imaging device fixed base 1 is picked up as image information by an image pickup optical system 2 and an image pickup device 3, the image information is processed by an image processing unit 4, and while an imaging surface image is displayed on an image display device 7 through a control unit 6, a position mark of the imaging surface is displayed to find the position of the imaging surface. As well as the imaging device, image information on the lens is picked up and a lens image is displayed on the image display device 7. Then the control unit 6 computes the position of the lens to be positioned about the imaging device from the position mark of the imaging surface and the position is displayed as a lens position mark on the image display device 7. The lens is moved to match the lens image with the position mark of the lens and thus the imaging device and lens are positioned. A setting means 5 sets the positions and sizes of the position mark of the imaging surface of the imaging device and the position mark of the lens.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a method for aligning an image pickup device and a lens, which positions a lens on the image pickup device and adheres and fixes the lens.

[0002]

2. Description of the Related Art Generally, in an image pickup apparatus using an image pickup device, it is necessary to adjust and mount a lens and an image pickup device at predetermined positions. In this case, according to the conventional technique, as described in, for example, Japanese Patent Application Laid-Open No. Hei 5-22640, the position of the lens and the image sensor is adjusted by performing a special molding process on the lens barrel and the image sensor holding member. It is installed together.

[0003]

However, in the method described in Japanese Patent Application Laid-Open No. Hei 5-22640, there is no description about a method for positioning a lens, and a method for forming a lens barrel and an image sensor holding member from a molding stage. Special processing must be applied.

The present invention has been made in view of the above-mentioned problems of the prior art, and provides an image sensor and a lens alignment method which can easily adjust a lens to a predetermined position with respect to the image sensor. Aim.

[0005]

In order to achieve the above object, an image pickup device and a lens alignment method according to the present invention provide an image pickup device and a lens for attaching a lens to a predetermined position with respect to an image pickup surface of the image pickup device. In the positioning method, the imaging surface and the lens of the imaging device are captured as image information, the position of the imaging surface is determined from the image information of the imaging surface of the imaging device, and a predetermined position calculated from the position of the imaging surface A lens position mark is displayed, and the position of the lens is adjusted based on the image information of the lens and the lens position mark.

According to the structure of the present invention, the image pickup surface of the image pickup device and the lens position mark correctly arranged on the image pickup surface are displayed, and the lens is moved so that the lens image matches the lens position mark. The position of the image sensor and the lens can be adjusted to the above.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of an apparatus used for a method of aligning an image sensor and a lens according to a plurality of embodiments described below. This apparatus comprises an image pickup device fixing base 1 for mounting an image pickup device, an image pickup optical system 2 for picking up an image pickup surface of the image pickup device placed thereon and a lens placed on a cover glass of the image pickup device as image information. A device 3, an image processing unit 4 for processing the image information, and setting positions and sizes of a position mark on an imaging surface of the image sensor, a position mark on a cover glass of the image sensor, and a position mark on a lens. A setting unit 5; a control unit 6 for controlling and calculating the display of the image information from the image processing unit 4, the position mark of the imaging surface of the image sensor, the position mark of the cover glass of the image device, and the position mark of the lens. And an image display device 7 for displaying an image processed by the control unit 6.

(Embodiment 1) FIGS. 2, 3, 4, and 5
FIG. 2 is a diagram showing Embodiment 1 of the present invention, FIG. 2 is a schematic diagram showing a configuration of an apparatus used for carrying out this embodiment, and FIG. 3 is displayed on the apparatus of FIG. 2 during the course of this embodiment. FIGS. 4 and 5 are simplified diagrams of a monitor screen to be displayed, and show work flowcharts of the present embodiment, which are divided in FIG.

In FIG. 2, there is a stage 11 for placing an image pickup device, and an image pickup device 13 is attached to an image pickup optical system 12 for taking in the image pickup device placed as image information. The imaging optical system 12 and the imaging device 13
Is designed to capture a lens placed on a cover glass of an image sensor as image information. An image processing board 14 for processing image information from the imaging device 13, a control computer 16 for capturing image information processed by the image processing board 14, and a computer 1.
A display device 17 for displaying the image information from 6;
A keyboard 15 for setting the position and size of a position mark of an image displayed on the display device 17 and inputting the position and size to a computer 16 is provided.

Next, a description will be given of an embodiment of the present invention, in which positioning is performed by the apparatus having the above configuration, with reference to FIGS. 2, 3, 4 and 5. Stage 11 with image sensor
And the imaging optical system 12 is moved to focus on the imaging surface of the imaging device (101). Thereafter, the image of the image sensor is continuously captured (102), and the computer 16
Display a continuous image on the display device 17 via the
3). FIG. 3A is a simplified diagram of this display, in which an image of an imaging surface of an imaging device (hereinafter, referred to as an imaging surface image) 21 and an image of a cover glass of the imaging device (hereinafter, referred to as a cover glass image) 22 are displayed. I have. At the same time, FIG.
As shown in (3), a position mark 23 of the image pickup surface and a position mark 24 of the cover glass are displayed on the image pickup surface image 21 of the image pickup device and the cover glass image 22 of the image pickup device (103). The position mark 23 on the imaging surface and the position mark 24 on the cover glass are squared so that the positions of the four corners of the square can be recognized, and the positions of the four corners can be set and changed.

On the display of the display device 17, the image pickup surface image 21 of the image pickup device and the position mark 23 of the image pickup surface, the cover glass image 22 of the image pickup device and the position mark 2 of the cover glass are displayed.
Check that the positions of 4 are correct (10
4), if the positions are not aligned as shown in FIG. 3B, the position mark 23 on the imaging surface and the position mark 24 on the cover glass
Is set from the keyboard 15 (105), and the position where the imaging surface image 21 of the imaging device and the position mark 23 on the imaging surface match, and the cover glass image 22 of the imaging device
The position mark 23 on the imaging surface and the position mark 24 on the cover glass are set at a position where the position mark 24 and the position mark 24 on the cover glass match.

As shown in FIG. 3 (c), when the position of the image pickup surface image 21 of the image pickup device and the position mark 23 of the image pickup surface and the position of the cover glass image 22 of the image pickup device and the position mark 24 of the cover glass match. The lens is placed on the cover glass of the image sensor, the image pickup optical system 12 is adjusted so that the end of the lens is in focus (106), and the image of the lens (hereinafter, referred to as a lens image) 25 is taken as an image plane image. 21 and the cover glass image 22 are displayed on the display device 17 being displayed.

When the lens is in focus, position mark 2
Switching from the display of 3, 24 to the position mark for the lens is instructed from the keyboard 15. By this instruction, the computer 16 sets the position mark 23 of the imaging surface set earlier.
, The center of the imaging surface is calculated, and the position mark 26 for lens positioning centered on the center is displayed as shown in FIG. 3D (107). The position of the lens is adjusted while viewing the lens image 25 and the position mark 26 of the lens, and the lens image 25 is adjusted to match the position mark 26 of the lens (109).

When the lens image 25 and the lens position mark 26 are aligned as shown in FIG. 3E, the imaging optical system 12 is adjusted so that the cover glass is in focus (11).
0), it is checked whether the cover glass image 22 of the image sensor and the position mark 24 of the cover glass match (11).
1). If this is not the case, take the lens (1
14), the display of the lens position mark 26 is erased (11)
5), the process is repeated from the setting (105) of the position mark 23 on the imaging surface.

If the cover glass image 22 of the image pickup device and the position mark 24 of the cover glass match, the lens is directly adhered and fixed (112).

According to the present embodiment, it is possible to simply and accurately position the image pickup device and the lens, and to confirm the position of the cover glass 24 of the image pickup device so that the image pickup after the lens position is adjusted. It is possible to confirm the displacement of the element.

(Embodiment 2) FIG. 6 is a diagram schematically showing a configuration of an apparatus used for carrying out Embodiment 2 of the present invention. The present embodiment is different from the first embodiment in that 18 is provided, and other configurations are the same.

When positioning is performed using the apparatus having the above configuration, an image of the image pickup device is captured by the image pickup optical system 12 and displayed on the display device 18 via the image pickup device 13, and the first embodiment is used. 3A, the imaging surface image 21 of the imaging device is displayed on the display device 17 as shown in FIG. Hereinafter, the positioning operation is the same as in the first embodiment.

According to the present embodiment, since the image of the image pickup device 13 can be immediately confirmed on the display device 18, the operator can easily confirm the position and orientation of the image pickup device, and the work efficiency is improved.

The technical idea having the following configuration is derived from the specific embodiment described above. (Supplementary Note) (1) In an alignment method of an image sensor and a lens for mounting a lens at a predetermined position with respect to an image surface of an image sensor, an image sensing surface of the image sensor is captured as image information, and imaging of the image sensor is performed. The position of the imaging surface is calculated from the image information of the surface, then the image information of the lens is taken in, a lens position mark is displayed at a predetermined position calculated from the position of the imaging surface, and the image information of the lens and the image information of the lens are displayed. A method of aligning an image sensor and a lens, wherein the position of the lens is adjusted using a lens position mark.

(2) In a method of aligning an image sensor and a lens for mounting a lens at a predetermined position with respect to an image sensing surface of an image sensor, an image sensing surface of a fixed image sensing device is captured as image information. Is displayed, an image pickup surface position mark is displayed from the image information of the image pickup surface of the image pickup device to determine the position of the image pickup surface, and then the image information of the lens is taken in, and the image of the lens is displayed on the image pickup surface image. A lens position mark is displayed at a predetermined position calculated from the position of the imaging surface, and the lens is moved so that the lens image matches the lens position mark, and the position of the lens with respect to the imaging surface is determined. And a method for aligning the imaging device and the lens.

(3) In a method of aligning an image sensor and a lens for mounting a lens at a predetermined position with respect to an image sensing surface of an image sensor, the image sensing means captures the image sensing surface of the fixed image sensor as image information. While displaying the image of the imaging surface on the display means, displaying the position mark of the imaging surface to determine the position of the imaging surface, then taking in the image information of the lens, displaying the image of the lens over the imaging surface image. Displaying a lens position mark at an alignment position between the imaging surface and the lens calculated from the position mark on the imaging surface, moving the lens so that the image of the lens matches the lens position mark, and moving the lens onto the imaging surface. A method of adjusting the position of an image sensor and a lens, comprising adjusting the position of the lens.

(4) The method for aligning an image sensor and a lens according to (3), wherein the image pickup means includes a display device for displaying the image sensor and the lens.

According to the alignment method between the image sensor and the lens described in the additional notes (1) to (3), the lens can be easily adjusted to a predetermined position with respect to the imaging surface of the image sensor without special processing. Is possible.

According to the method for aligning the image pickup device and the lens described in Appendix (4), the image of the image pickup means can be immediately confirmed on the display device, and the work efficiency can be improved.

[0026]

As described above, according to the method for aligning the imaging device and the lens of the present invention, no special processing is required, and the lens can be easily positioned at a predetermined position with respect to the imaging surface of the imaging device. It is possible to match.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of an apparatus used for an alignment method according to the present invention.

FIG. 2 is a schematic diagram illustrating a configuration of an apparatus used in Embodiment 1 of the present invention.

FIG. 3 is a simplified diagram showing a monitor screen according to the first embodiment of the present invention.

FIG. 4 is a work flowchart according to the first embodiment of the present invention, which is a division view from FIG. 5;

FIG. 5 is a work flowchart according to the first embodiment of the present invention, and is a division view from FIG. 4;

FIG. 6 is a schematic diagram showing a configuration of an apparatus used in Embodiment 2 of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image sensor fixed base 2 Imaging optical system 3 Imaging device 4 Image processing unit 5 Setting means 6 Control unit 7 Image display device 11 Stage 12 Imaging optical system 13 Imaging device 14 Image processing board 15 Keyboard 16 Computer 17, 18 Display device 21 Imaging Image of surface 22 Image of cover glass 23 Position mark of imaging surface 24 Position mark of cover glass 25 Image of lens 26 Position mark of lens

Claims (1)

[Claims] 1. A method of aligning an image sensor and a lens for mounting a lens at a predetermined position with respect to an image surface of an image sensor, wherein the image sensor and the lens of the image sensor are captured as image information. The position of the imaging surface is determined from the image information of the imaging surface, a lens position mark is displayed at a predetermined position calculated from the position of the imaging surface, and the position of the lens is determined by the image information of the lens and the lens position mark. And a method for aligning the imaging device and the lens.