TWI422893B - Calibrating system - Google Patents

Description

Calibration system

The invention relates to a correction system, in particular to a calibration system applied in the assembly process of a lens module.

In recent years, with the development of multimedia technology, the application range of lens modules has become wider and wider, such as in electronic products such as digital cameras, video cameras, and mobile phones with camera functions. People are pursuing miniaturization of digital cameras, camcorders, and mobile phones with camera functions. At the same time, they have placed higher demands on the image quality of their subjects, that is, the image of the object to be photographed is clear, and the image quality of the object is Much depends on whether the optical axes of the lenses in the lens module are coincident during assembly (Lpheus W. Burner et al., Papers on the 1995 SPIE System, Videometrics IV) The "Zoom lens calibration for wind tunnel measurements" reveals the influence of the misalignment of the optical axes of the lenses in the lens module. Therefore, the assembly of the lens must be quite accurate to increase the probability of coincidence of the optical axis, thereby improving the imaging quality of the lens module.

The lens module usually includes a Barrel, a Holder, a lens, a spacer ring, and a filter. The optical components such as a lens, a spacer ring, and a filter are sequentially fixed along the central axis of the lens barrel. In the lens barrel. During assembly of the lens module, the nozzle sucks optical elements such as lenses, spacer rings, filters, and the like, and loads the optical components into the lens barrel. After the optical component is placed in the lens barrel, a calibration fixture such as a pressure bar is usually used first. The lens is inserted into the lens barrel to correct the position of the optical components in the lens barrel, and then a measuring instrument is used to measure whether the optical component has reached the corresponding position in the lens barrel. The process is complicated and the assembly efficiency is low.

In view of this, it is necessary to provide a correction system that can improve the assembly efficiency of the lens module.

A calibration system for correcting the position of an optical component in a lens barrel during assembly of a lens module, comprising: a carrier having a bearing surface for carrying the lens barrel; a support frame, the support The rack includes a horizontal fixing portion, the horizontal fixing portion is disposed opposite to the bearing surface, the lens barrel is located between the horizontal fixing portion and the bearing surface during assembly of the lens module, and a calibration fixture, the calibration fixture includes a fixing sleeve, the outer side of the fixing sleeve is provided with a first length scale line along the axial direction thereof; a rotating sleeve sleeved on the outer side of the fixing sleeve; a rotating rod, the rotation The rod is screwed to the inner diameter surface of the fixing sleeve, and one end of the rotating rod is fixed to the inner bottom of the rotating sleeve through the fixing sleeve, and the other end of the rotating rod is a free end; the rotating sleeve is close to the rotating end An end surface of the free end of the rod is used to indicate the value of the first length scale line, and the fixing sleeve is fixed to the horizontal fixing portion away from one end of the rotating sleeve, and the fixing sleeve and the rotating sleeve are located at the horizontal fixing portion Stay away from the bearing The station side, the rotating shaft passes through the horizontal fixing portion is provided.

Compared with the prior art, the correction jig uses the end face of the rotating sleeve close to the free end of the rotating rod to indicate the length tick mark of the outer surface of the fixing sleeve, and can precisely control the end surface of the rotating rod near the bearing surface and the The distance between the bearing surfaces, so as to precisely control the rotation of the rotating rod into the lens barrel placed on the bearing surface, the optical element is in a specific position in the lens barrel, thereby eliminating the need to use another measuring instrument to measure The The position of the optical element within the lens barrel improves assembly efficiency.

10‧‧‧Loading station

12‧‧‧ bracket

14‧‧‧Correct fixture

32‧‧‧ lens

34‧‧‧Mirror tube

100‧‧‧ calibration system

102‧‧‧ bearing surface

122‧‧‧ horizontal fixed part

124‧‧‧Support feet

142‧‧‧Fixed sleeve

144‧‧‧Rotating sleeve

148‧‧‧Rotary rod

150‧‧‧pressure cap

322‧‧‧Optical Department

324‧‧‧Connecting Department

1422, 1442‧‧‧ length tick

1424‧‧‧ baseline

1444‧‧‧ end face

1482‧‧‧Free end

1502‧‧‧ cups

1504‧‧‧ Pressed end

1506‧‧‧ Pressing surface

1508‧‧‧Depression

FIG. 1 is a partial cross-sectional view showing a calibration system and a lens module according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing the correction system of FIG. 1 when the lens is corrected.

The invention will be further described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 , which is a calibration system 100 for correcting the position of an element in a lens barrel during assembly of a lens module. This embodiment is used to correct the position of the lens 32 in the lens barrel 34 . For example. In the present embodiment, the lens 32 is a lenticular lens including an optical portion 322 at a central portion and a connecting portion 324 surrounding the optical portion 322. The calibration system 100 includes a carrier 10, a bracket 12, and a calibration fixture 14.

The carrier 10 has a bearing surface 102 on which the lens barrel 34 is placed. The bracket 12 has a horizontal fixing portion 122 and two supporting legs 124 for supporting the horizontal fixing portion 122. The horizontal fixing portion 122 is located above the bearing surface 102 and opposite to the bearing surface 102. The two supporting legs 124 are located at two sides of the lens barrel 34, and the two ends of each supporting leg 124 are respectively associated with the horizontal fixing portion 122 and The carrier 10 is connected and fixed to maintain the horizontal fixing portion 122 and the bearing surface 102 at a fixed distance. The supporting leg 124 and the horizontal fixing portion 122 can be fixed by a screw connection or an integral structure, and the embodiment is an integral structure. It can be understood that the support leg 124 can also be one. At this time, the two ends of the support leg 124 are respectively fixedly connected to the horizontal fixing portion 122 and the loading platform 10; or the horizontal fixing portion 122 is fixed to a wall plate, as long as A fixed distance between the horizontal fixing portion 122 and the bearing surface 102 can be maintained.

The calibration fixture 14 includes a fixed sleeve 142, a rotating sleeve 144 and a rotating rod 148. The rotating sleeve 144 is sleeved on one end of the fixing sleeve 142. The rotating rod 148 is screwed to the inner diameter surface of the fixing sleeve 142, and one end of the rotating rod 148 is fixed to the inner bottom of the rotating sleeve 144 through the fixing sleeve 142. The other end of the rotary lever 148 is a free end 1482 that extends out of the fixed sleeve 142. The outer surface of the fixing sleeve 142 is provided with a length scale line 1422 along its axial direction, and the rotating sleeve 144 is provided with a length scale line 1442 along its outer circumference near one end of the free end 1482.

One end of the fixing sleeve 142 and the rotating sleeve 144 is fixed to the horizontal fixing portion 122. The rotating rod 148 is disposed on the horizontal fixing portion 122. The rotating sleeve 144 and the fixing sleeve 142 are located at the horizontal fixing portion 122 away from the horizontal fixing portion 122. On one side of the carrier 10, the free end 1482 of the rotary lever 148 is located on one side of the horizontal fixing portion 122 near the carrier 10. The central axis of the fixed sleeve 142 is perpendicular to the horizontal fixing portion 122.

The end face 1444 of the rotating sleeve 144 near the free end 1482 of the rotating rod 148 is perpendicular to the outer surface of the fixing sleeve 142 for indicating the scale indication of the length scale line 1422, and the outer surface of the fixing sleeve 142 extends along the axial direction thereof. A reference line 1424 is used to indicate the scale of the length scale line 1442 of the surface of the rotating sleeve 144. The total scale of the length scale line 1442 along the circumference of the rotating sleeve 144 is equal to the distance that the rotating rod 148 moves along the axial direction of the rotating sleeve 144. The length scale line 1442 is similar to the scale line of the micrometer surface of the micrometer. It is used to estimate one or the next two readings below the minimum scale value of the length scale line 1422, the sum of the indications of the length scale lines 1422 and 1442 being equal to the scale indication indicated by the end face 1444 of the rotating sleeve 144. For example, the minimum scale value of the length scale line 1422 is 1 mm, the total scale value of the length scale line 1442 is 1 mm, and the total value of the scale of 1 mm is one hundred equal parts, and when the length scale line 1422 is 10 mm, the reference line When the indication of the length scale line 1442 indicated by 1424 is 0.12 mm At this time, the scale indicated by the end face 1444 of the rotating sleeve 144 is 10.12 mm.

A pressing cap 150 is disposed on one end of the rotating rod 148 adjacent to the bearing surface 102. One end of the cap 150 is a cup 1502. The inner shape of the cup 1502 matches the free end 1482 of the screw 148. The cup 1502 is sleeved on the free end 1482 of the screw 148, thereby The cup 1502 mates with the spinner 148.

The other end of the pressing cap 150 opposite to the cup 1502 is a pressing end 1504. The pressing end 1504 has a pressing surface 1506 for contacting the lens 32 and pressing the lens 32, thereby The position of the lens 32 within the lens barrel 34 is corrected. The central portion of the pressing surface 1506 defines a recessed portion 1508 for receiving the optical portion 322 of the lens 32. The recessed portion 1508 is sized to receive the optical portion 322 therein, and the recessed portion A gap is left between the surface of the 1508 and the optical portion 322 to prevent the optical portion 322 from being scratched when the pressing surface 1506 is pressed against the lens 32. The press-fit end 1504 is designed in such a shape to correct other optical components incorporated into the lens barrel 34, such as a biconcave lens, a convex concave lens, a spacer ring or a filter, and the like.

Referring to FIG. 2 together, the calibration system 100 corrects the position of the lens 32 in the lens barrel 34 as follows:

(1) First, the end surface 1444 of the rotating sleeve 144 is adjusted to indicate the zero point position. When the pressing surface 1506 of the pressing cap 150 is in contact with the bearing surface 102, the length marking lines 1422 and 1442 indicated by the end surface 1444 are zero. Time.

(2) Rotating the rotating sleeve 144 to raise the pressure cap 150, placing the lens barrel 34 with the lens 32 mounted thereon on the bearing surface 102 of the loading table 10, and making the lens barrel 34 and the rotating rod 148 Coaxial.

(3) rotating the rotating sleeve 144, driving the rotating rod 148 to be provided with the end of the pressing cap 150 Moving toward the lens barrel 34, the pressure cap 150 is inserted into the lens barrel 34, and the pressing surface 1506 of the pressure cap 150 is pressed against the connecting portion 324 of the lens 32, as indicated by the end surface 1444 of the rotating sleeve 144. The scale values of the length tick marks 1422 and 1442 are used to control the height of the pressing surface 1506 relative to the bearing surface, thereby controlling the depth of the lens 32 into the lens barrel 34, thereby appropriately fitting the lens 32 into the lens barrel 34. position.

The outer circumference of the fixing sleeve 142 and the outer circumference of the rotating sleeve 144 are respectively provided with length marking lines 1422 and 1442, similar to the fixed sleeve and the differential cylinder of the micrometer, and the distance between the horizontal fixing portion 122 and the bearing surface 102 is fixed. Therefore, the position of the pressure cap 150 at the end of the rotary lever 148, that is, the distance between the pressing surface 1506 and the bearing surface 102 can be determined in advance, and the pressure is determined by reading the scale value indicated by the end surface 1444 of the rotary sleeve 144. The position of the cap 150 in the lens barrel 34 allows the lens 32 to be pressed to a predetermined position while correcting the lens 32, eliminating the need for other measuring instruments to measure whether the lens 32 is in the corresponding position within the lens barrel 34. Improve assembly efficiency.

It can be understood that the calibration system 100 can also be used to press-fit other optical components assembled in the lens barrel 34, such as spacer rings, etc., and accordingly, differently shaped pressing faces can be replaced and different according to the different optical components to be pressed. The size of the pressure cap; of course, the free end 1482 of the rotary lever 148 can also be designed to be suitable for pressing the shape of the optical element, directly adopting the end surface of the free end 1482 of the rotary lever 148 to press the optical in the lens barrel 34. The components are not limited to the embodiment.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧Loading station

12‧‧‧ bracket

14‧‧‧Correct fixture

32‧‧‧ lens

34‧‧‧Mirror tube

100‧‧‧ calibration system

102‧‧‧ bearing surface

122‧‧‧ horizontal fixed part

124‧‧‧Support feet

142‧‧‧Fixed sleeve

144‧‧‧Rotating sleeve

148‧‧‧Rotary rod

150‧‧‧pressure cap

322‧‧‧Optical Department

324‧‧‧Connecting Department

1422, 1442‧‧‧ length tick

1424‧‧‧ baseline

1444‧‧‧ end face

1482‧‧‧Free end

1502‧‧‧ cups

1504‧‧‧ Pressed end

1506‧‧‧ Pressing surface

1508‧‧‧Depression

Claims (5)

A calibration system for correcting the position of an optical component in a lens barrel during assembly of a lens module, comprising: a carrier having a bearing surface for carrying the lens barrel; a support frame, the support The rack includes a horizontal fixing portion, the horizontal fixing portion is disposed opposite to the bearing surface, the lens barrel is located between the horizontal fixing portion and the bearing surface during assembly of the lens module, and a calibration fixture, the calibration fixture includes a fixing sleeve, the outer side of the fixing sleeve is provided with a first length scale line along the axial direction thereof; a rotating sleeve sleeved on the outer side of the fixing sleeve; a rotating rod, the rotation The rod is screwed to the inner diameter surface of the fixing sleeve, and one end of the rotating rod is fixed to the inner bottom of the rotating sleeve through the fixing sleeve, and the other end of the rotating rod is a free end; the rotating sleeve is close to the rotating end The end surface of the free end of the rod is used to indicate the value of the first length scale line. By rotating the rotating sleeve, the free end of the rotating rod is driven to move toward the lens barrel, and the end surface of the free end is combined to indicate the first length scale. Number of lines Controlling the depth of the optical element into the lens barrel, thereby pressing the optical element to a proper position in the lens barrel, the fixing sleeve being fixed to the horizontal fixing portion away from one end of the rotating sleeve, the fixing sleeve and the rotating sleeve The cylinder is located at a side of the horizontal fixing portion away from the carrying platform, and the rotating rod is disposed through the horizontal fixing portion. The calibration system of claim 1, wherein the outer circumference of the rotating sleeve is provided with a second length scale line, and the total scale of the second length scale line is equal to the rotation of the rotating sleeve. The distance the rod moves in its axial direction. The calibration system of claim 1, wherein the free end of the rotary sleeve is provided with a pressure cap having a pressing surface for pressing the optical component into the lens barrel. The calibration system of claim 3, wherein the central portion of the pressing surface is provided with a recess for engaging the optical component. The calibration system of claim 1, wherein the support frame further comprises at least one support leg, and the two ends of the at least one support leg are respectively fixedly connected to the support base and the horizontal fixing portion.