JPS60230604A - Lens - Google Patents

Abstract

PURPOSE:To prevent the outflow and oozing of an adhesive agent to a lens face in the stage of attaching a lens to a lens holder by providing a groove to the face in the optical axis direction of a lens body. CONSTITUTION:An annular groove 3 is provided to the lens body 1 along the outside circumferential edge 2 thereof. The groove 3 is made into the shape of a groove having a V-shape 3a, U-shape 3b or other shapes at a cross section. The oozing and outflow of the excess adhesive agent 6a coated on the outside circumference of the lens 4 are prevented by the annular groove 3 in the case of fixing the lens 4 to a lens barrel 5 by the agent 6.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a lens used in a lens holding device for fixing the lens to a lens frame with an adhesive.

Conventional technology Conventionally, in a lens holding device that fixes a lens to a lens frame such as a lens barrel with an adhesive, after dropping the lens into the lens fitting part of the lens barrel, there is a gap between the lens and the lens fitting part (cy). A method has been adopted in which adhesive is injected into the radial clearance that occurs in the area (e.g., through the needle of a syringe or through a thin rod-shaped member) and the adhesive is solidified. There is.

In addition, for the purpose of preventing distortion in the method of holding the lens frame due to the injection and solidification of the adhesive, Japanese Patent Laid-Open No. 58-195
The invention described in No. 811 has been proposed.

However, in these known lens holding devices, the adhesive injected into the radial clearance that occurs between the lens and the lens fitting part of the lens barrel smears or flows out onto the lens surface, causing the effective diameter surface of the lens to become distorted. As a result, the original optical function of the lens may be lost, or the appearance of the outer periphery of the lens may be damaged. was required.

However, a method and a suitable device for preventing the adhesive from smearing or flowing out in such a lens holding device have not yet been developed.

According to an object of the invention, the present invention prevents the adhesive from bleeding or flowing out onto the lens surface in a lens holding device that holds a lens by adhering it to a lens frame using an adhesive. The objective is to provide lenses that do not impair functionality.

SUMMARY OF THE INVENTION Namely, the lens of the present invention has a groove in the lens body or the adhesive end protruding from the outer periphery of the lens body, so that an adhesive can be injected between the lens and the lens fitting portion of the lens barrel. The structure is such that bleeding or outflow to the effective diameter surface or lens surface can be prevented by the surface tension of the groove or by being collected in the groove.

EXAMPLES Specific examples of the lens of the present invention will be described below with reference to the drawings.

(First Embodiment) Fig. 1 is a partially omitted front view showing the first embodiment of the lens of the present invention, Fig. 2 α is a sectional view of the same essential part, and Fig. 3 is a mirror view of the lens of the present invention. It is a longitudinal cross-sectional view showing a state held in a cylinder.

In the figure, reference numeral 1 denotes a lens body, and the lens body 1 has an annular groove 3 formed along its outer peripheral edge 2.

Further, the annular grooves 3 are provided on both sides of the lens body 1 in the optical axis direction.

Further, in its cross-sectional shape, the annular groove 3 has a groove 3α with a 7-shaped cross section (see Figure 2), a groove 3A with a U-shaped cross section (see Figure 2 α), or a cross-section similar to these. It can be implemented by grooves having a different shape or grooves (not shown) having other appropriate cross-sectional shapes, and the number of annular grooves 3 is also limited to one annular groove 3 as shown in FIG. First, as shown in Figure 2C, two cross sections V
This can be implemented by providing a letter-shaped annular groove 3.3' or by providing two or more annular grooves (not shown).
This can also be implemented by providing an annular groove 3 along the outer circumferential edge 2α of the lens body 1 as shown in FIG. d, and is not limited to the configuration shown in the first figure.

The material of the lens body 1 can be made of plastic or other optical synthetic resin in addition to glass, and its shape may be rectangular or triangular in addition to the circular shape shown in the first figure. shapes, other polygons,
It is possible to use lenses having shapes similar to these or other appropriate shapes. Further, the grooves 3 and 3' can be formed simultaneously with the lens body 1, or can be processed separately.

When the lens 4 having the above structure is fixedly held on the lens barrel 5 by the adhesive 6, the lens 4 is fixed as shown in FIG.
The lens 4 can be firmly held within the lens barrel 5 by applying adhesive 6 to the outer periphery of the lens, dropping it into the lens barrel 5, positioning and fixing it, and solidifying the adhesive 6.

During the above operation, the adhesive 60 applied to the outer periphery of the lens 4 bleeds or flows out onto both lens surfaces T of the lens 4 in the optical axis direction. At the position of the annular groove 3 provided along the peripheral edge 2, due to the surface tension action of the annular groove 3 or due to the accumulation of excess adhesive 6g within the annular groove 3 (not shown),
It is possible to completely prevent bleeding or leakage of both lens surfaces 7 of the lens 4 to the lens effective diameter surface, and it is possible to completely prevent both lens surfaces 7 of the lens 4 from bleeding or flowing out to the lens effective diameter surface. It is something that can demonstrate its performance.

(ls2 example).

FIG. 4 is a partially omitted front view showing a second embodiment of the lens of the present invention.

In the figure, 1 is a lens body, and shows an embodiment in which a lens 40 is formed by arranging a plurality of independent grooves 30 at intervals along the outer peripheral edge 2 of the lens body 1. In addition, each groove 30 is shown as being formed in an arc shape,
The shape is not limited to this, and the arrangement position and number are not limited to the illustrated embodiment, and other configurations can be implemented in accordance with the annular groove 3 of the first embodiment described above. The shape and molding material of the lens body 1 can also be implemented in the same manner as in the first embodiment, and specific illustrations and detailed explanations will be omitted.

Further, since the method of fixing and holding the lens 40 to the lens barrel according to the second embodiment and its operation can be easily understood from the explanation of the first embodiment, the explanation thereof will be omitted.

(Third Embodiment) FIG. 5 α and table are a partially omitted front view showing a third embodiment of the lens of the present invention, and FIG. 5 is a sectional view thereof.

In the figure, reference numeral 1 denotes a lens body, and a flange-shaped adhesive end 8 is provided protruding from the outer periphery of the lens body 1.

Also, both surfaces 8 of the adhesive end 8 in the optical axis direction of the lens body 1
An annular groove 9 is provided in the circumferential direction at α, 8b.

Furthermore, regarding the method of forming the lens body 1 and the adhesive end 8, in addition to forming both integrally, it is also possible to form the lens body 1 separately and then form the adhesive end B by a molding method or the like. It is possible, and the adhesive end 8 can be formed using various materials as needed.

In addition, in the configuration of the lens 10 of the above-mentioned embodiment, the shape and material of the lens body 1 and the structure of the annular #9 may be implemented with the same structure as that of the first embodiment or a structure based thereon. In addition, from these configurations, the method and effect of fixing a certain lens 10 to the lens barrel using an adhesive can be easily understood from the explanation of the first embodiment. is omitted.

(Fourth Example) Figure 6 is a partially omitted front view showing a fourth example of the lens of the present invention.

Therefore, the lens 11 of the fourth embodiment shown in the figure has a plurality of independent adhesive ends 80 protruding from the outer periphery of the lens body 1 at intervals in the circumferential direction, and each adhesive end 8
0, which is formed by providing one groove 90 on each of the same both surfaces of the lens body 1 in the optical axis direction (only one surface 80α is shown in the drawing), is referred to as the third real # column. It makes a difference.

Therefore, in the configuration of the lens 11 in this embodiment, the shape and material of the lens body 1, the material of the adhesive end 80, and the method of forming it with the lens body 1 are similar to those in the first and third embodiments. In addition, the shape and number of each adhesive end 80 are not limited to the embodiment shown in FIG. The configuration of the cross-sectional shape and number of the grooves 90 in the lens 11 can also be implemented according to the configuration of the first embodiment. The method and operation of fixing the lens 11 to the lens barrel using adhesive can be easily understood from the explanation of the method and operation of the first embodiment, and specific illustrations and detailed explanations thereof will be omitted. do.

Effects of the Invention As is clear from the above explanation, according to the lens of the present invention, grooves are provided on the surface of the lens body in the optical axis direction or on the surface of the adhesive end provided on the outer periphery of the lens body, so that the lens can be attached to the lens frame. When holding the lens firmly inside the lens fitting part with adhesive,
This type of lens holding device is configured to prevent excess adhesive from oozing or flowing out onto the lens surface or its effective diameter surface, and to maintain the optical functions required of the lens surface of the lens. be able to.

Therefore, it is possible to eliminate the need for removal work such as cleaning of excess adhesive required in the conventional process of assembling a lens into a lens barrel, and it is possible to simplify the work of assembling this type of lens and to simplify the number of processes. , it is possible to widen the range of standards for the amount of adhesive applied, and the bonding work itself can be simplified.

In addition, with plastic lenses, it is difficult to remove excess adhesive by cleaning, etc., which is one of the causes of lower assembly yields, but by applying the lens of the present invention, these drawbacks can be solved at once. can do.

Furthermore, according to the second aspect of the present invention, since the groove is formed through the adhesive end provided on the outer periphery of the lens body, there is an advantage that the entire lens surface of the lens body can function as a lens. It is something.

[Brief explanation of the drawing]

FIG. 1 is a partially omitted front view showing the first embodiment of the lens of the present invention, FIGS. A vertical cross-sectional view showing the lens shown in the figure fixedly held in the lens barrel by adhesive.
Fig. 4 is a partially omitted front view showing the second embodiment of the lens of the present invention, Fig. 5 α is a partially omitted front view showing @3 actual autopsy example of the present invention lens, Fig. 5 6 is a longitudinal sectional view of the same, and FIG. 6 is a partially omitted front view showing a fourth embodiment of the lens of the present invention. 1... Lens body 2... Outer periphery 3.3', 9... Annular structure 4.10.11.40, 轡, lens 5, lens barrel 6... Adhesive θα-... Surplus adhesive 7 - Lens surface 8.80 - Glue - Adhesive end 30.90 - Groove Patent applicant Olympus Optical Industry Co., Ltd. Figure 1 Figure 5 Figure 6

Claims (1)

[Scope of Claims] (1) A lens formed by providing a groove on the surface in the optical axis direction of the lens body. (2) The groove is characterized by at least one or more annular grooves along the outer periphery of the lens body. fl'f Claim 1
Lenses listed in section. (3) The lens according to claim 1, wherein the groove comprises a plurality of independent grooves arranged at intervals along the outer peripheral edge of the lens body. (4) The lens according to claim 1, stake 2, or 3, wherein the groove is formed in a cross-sectional shape of a V-shape, a U-shape, a shape similar to these, or another shape. . (5) The lens according to claim 1 or 3, wherein the groove comprises a plurality of independent arc-shaped grooves. (6) The lens body has a circular shape, a rectangular shape, a triangular shape,
The lens according to claim 1, 2, 3, or 4, which has another polygonal shape or a shape similar to these. (7) The lens body is made of glass or plastic;
Claims 1, 2, 3, 4, 5, or 6 made of other optical synthetic resins
Lenses listed in section. (8) A lens in which an adhesive end is provided on the outer periphery of the lens body, and a groove is provided in the surface of the adhesive end in the optical axis direction. (9) The lens according to claim 8, wherein the groove comprises at least one annular groove. 0. The lens according to claim 8, wherein the groove comprises a plurality of independent grooves arranged at intervals. 01) The lens according to claim 8, 9, or 10, wherein the groove is formed in a cross-sectional shape of a V-shape, a U-shape, a shape similar to these, or another shape. . Q21 The groove is formed of a plurality of independent arc-shaped grooves. The lens according to claim 8 or 1 (l). αJ The lens body has a circular, rectangular, triangular, or other polygonal shape. or the lens according to claim 8, 9, 10, 11, or 12, which has a shape similar to these.Q4) The adhesive end is attached to the outer periphery of the lens body, 14. A lens as claimed in claim 8, 11 or 13 comprising a plurality of separate adhesive ends spaced apart. a9 The lens body and the adhesive end are formed of glass, plastic, or other optical synthetic resin.Claims 8, 9, 10, 11, and 12
The lens according to item 13 or item 14.