JP2519619Y2 - camera - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to either a light-receiving element that receives light from a field and converts it into an electrical signal, or a light-emitting element that emits light to the field. The present invention relates to a camera including at least one and a synthetic resin lens disposed between the element and the object scene.

[Conventional technology]

Conventionally, a light receiving element or a light emitting element and a lens arranged in front of the light receiving element or the light emitting element have been mounted as shown in FIG. That is, the element 11 was fixed so as to be in close contact with the substrate 12 and electrically connected, and the substrate 12 and the lens 13 were separately attached to the block block 14.

[Problems to be solved by the invention]

With such a configuration, the element 11 and the lens 13
Positioning in the direction perpendicular to the lens optical axis, so-called optical axis alignment, will be affected by the external dimension accuracy of each component. Therefore, accurate optical axis alignment becomes difficult, and the desired light receiving element or light emitting element There was a problem that it was not possible to obtain the performance of.

Therefore, an object of the present invention is to provide a positioning device for a light-receiving element or a light-emitting element and a lens, which has a simple structure and is capable of correctly aligning the optical axes of the light-receiving element or the light-emitting element and the lens arranged in front of it. is there.

[Means for solving problems]

For the above-mentioned purpose, in the device of the present invention, at least one of a light receiving element that receives light from the field and converts it into an electric signal or a light emitting element that emits light to the field (1)
And a synthetic resin lens (2) disposed between the element and the object field, wherein at least one of the elements is a lead frame for electrical connection with another portion. A lens (1b) and a mold part (1c) covering at least the lens side of the element, wherein the lens is an attachment part (2c) extending to the element side outside the optical path; And an abutting portion (2b) formed of a plane in a direction orthogonal to the optical axis of the lens disposed between the element, the element, the mold portion (the surface 1f of 1c) to contact the abutting portion of the lens, The lead frame portion (1b) so as to regulate the displacement in the direction orthogonal to the lens optical axis.
By engaging and fixing the mounting portion (2c),
It is integrally fixed to the lens.

[Action]

With such a configuration, the element (1) and the lens (2) are unitized with a simple structure, and thus reliable optical axis alignment is realized.

1 and 2 show an embodiment in which the present invention is applied to a light receiving element and a lens arranged in front of it, and FIG. 1 shows a unit including both of them in a plane including an optical axis. FIG. 2 is a cross-sectional view taken along a line, and FIG. 2 is a front view of only the light receiving element viewed from the lens side.

In both figures, the light receiving element 1 comprises a photoelectric conversion section 1a, a lead frame section 1b, and a molding section 1c. The photoelectric conversion unit 1a receives the field light condensed by the lens 2 and converts it into an electric signal. The photoelectric conversion section 1a is fixedly provided in the lead frame section 1b, and the electric signal generated from the photoelectric conversion section 1a is transmitted to a circuit (not shown). The mold part 1c is made of a transparent insulating material and covers the entire surface of the photoelectric conversion part 1a and a part of the lead frame part 1b. A positioning hole 1d and a positioning elongated hole 1e are provided in a portion of the lead frame portion 1b extending from the mold portion 1c.

The lens 2 is made of synthetic resin and has a mounting projection 2a and
The contact surface 2b and the pair of positioning bosses 2c form the lens 2
It is attached to the outside of the optical path by integral molding. Mounting projection 2a
Fixes the lens 2 to the camera by fitting it into a recess formed in the camera (not shown). The contact surface 2b is in contact with the surface of the portion of the mold portion 1c that covers the peripheral portion of the photoelectric conversion portion 1a of the light receiving element 1, and the lens 2 and the light receiving element 1
And position the lens along the optical axis. The pair of positioning bosses 2c are kept at a specified distance from the optical axis of the lens 2, are fitted into the positioning holes 1d and 1e of the light receiving element 1, and the tips penetrating therethrough are crushed by heat. . By fixing the positioning boss 2c and the positioning holes 1d and 1e, the optical axes of the lens 2 and the light receiving element 2 are aligned, and unitization is achieved.

In FIG. 2, the photoelectric conversion unit 1a includes a central light receiving unit 1 for measuring the central portion of the object field in a circular portion at the center as shown in the figure.
g, peripheral light receiving that measures the peripheral area of the field around it g 1h
Are arranged. The lead frame part 1b is the central light receiving part.
It is a common output terminal common to 1g and peripheral light receiving part 1h.

The lead frame portions 1i and 1j are fixed by the mold portion 1c similarly to the lead frame portion 1b, and are electrically connected to the central light receiving portion 1g and the peripheral light receiving portion 1h by wire bonding, respectively, as shown in FIG. It is the output terminal of the part.

The positioning hole 1d connects the photoelectric conversion unit 1a to the lead frame unit 1b.
The lead frame 1 is accurately opened so as to take a predetermined position with respect to a positioning mark (not shown) on the lead frame 1 which is used for fixing it on top. Further, the lens 2 comes into contact with the peripheral surface of the positioning boss 2c. The position of the long hole 1e in the short width direction is also opened so as to take a predetermined position with respect to the positioning mark.

When the unit of the light receiving element 1 and the lens 2 shown in FIG. 1 is attached to the camera, the light from the object field passes through the lens 2 and is collected in the photoelectric conversion unit 1a, and is photoelectrically converted into electric power. It will be output as a signal. At this time, the position of the photoelectric conversion unit 1a with respect to the optical axis of the lens 2 is
Positioning boss 2c and lead frame 1b positioning hole 1d,
It is specified with high accuracy by being fixed to 1e. Therefore, it is possible to accurately measure the range of the field to be measured, which is particularly effective when so-called backlight correction is performed. Because the backlight compensation is the output of the central light receiving unit 1g that measures the narrow area in the center of the object field and the peripheral light receiving unit that measures the surrounding area.
When it is determined that the backlight at the center is significantly lower than the surroundings by comparing the output of 1h, the flash device emits light, the exposure is corrected, etc. In this case, if the optical axes of the light receiving element 1 and the lens 2 are incomplete, and the light from the main subject in the center of the field does not enter the central light receiving portion 1g but enters the peripheral light receiving portion 1h, This is because it cannot be determined that the backlight condition exists and the backlight correction function does not work. In this embodiment, since the optical axes of the light receiving element 1 and the lens 2 are accurately aligned, such a situation does not occur, and the backlight compensation functions as intended.

Although the light receiving element for exposure control has been described in the present embodiment, the present invention is not limited to this, and it is for focus detection (for distance measurement).
It is also applicable to the light receiving element and the light emitting element.

[Effect of device]

As described above, according to the device of the present invention, the mold part (1c) of the element (1) and the contact part (2b) of the lens (2).
And the lead frame part (1b) and the mounting part (2c) are engaged and joined so as to regulate the deviation in the direction orthogonal to the lens optical axis. Adjust the position of the lens and the element in the direction of contact by contact between the mold part and the contact part, and adjust the position of the lens and the element in the direction orthogonal to the optical axis of the lens by joining the lead frame part and the mounting part. it can. Therefore, the optical axis can be surely aligned with a simple structure and can be unitized.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a front view of a light receiving element, and FIG. 3 is a sectional view of a prior art. [Explanation of symbols of main parts] 1 ... Light receiving element 2 ... Lens 1a ... Lead frame portion 2c ... Positioning boss

Claims (1)

(57) [Scope of utility model registration request] 1. An element and at least one of a light-receiving element that receives light from an object scene and converts it into an electric signal or a light-emitting element that emits light to the object field, and the element and the object field. In a camera including a synthetic resin lens disposed between and, at least one of the elements covers a lead frame portion for electrical connection with another portion, and at least the lens side of the element. A mold portion, wherein the lens is a mounting portion extending to the element side outside the optical path, and an abutting portion formed between the lens and the element, and a flat surface in a direction orthogonal to the optical axis of the lens; In the device, the mold portion is brought into contact with the contact portion of the lens, and the lead frame portion is engaged with the mounting portion so as to regulate the deviation in the direction orthogonal to the lens optical axis. By fixing , Camera, characterized in that integrally fixes the lens.