TW200537121A - Camera lens - Google Patents

Abstract

A camera lens includes a barrel, a first lens, a second lens and an optical filter module. The barrel includes a first container and a diaphragm. The first lens is disposed in the first container next to the diaphragm. The second lens is disposed in the first container with a distance from the first lens. The optical filter module is disposed in the first container between the first and the second lens.

Description

200537121 V. Description of the invention (1) (1), [Technical field to which the invention belongs] The present invention relates to an image-taking lens, particularly an image-taking lens having a filter assembly disposed between a first lens and a second lens. (B). [Prior art] Please refer to FIG. 1. The conventional image taking lens 1 includes a lens barrel 11, a first lens 12, a gasket 13, a second lens 14, and a cut-off filter. The lens 15, a sensor 16 and a base 17. The lens barrel 11 is connected to the base 17 and includes a receiving portion 111 and an aperture 11 2. The first lens 12 is disposed on the receiving portion 11 1 and is adjacent to the aperture 11 2. The washer 1 3 is disposed on the receiving portion 111 and is adjacent to the first lens 12. The second lens 14 is disposed on the receiving portion 111 and is adjacent to the washer 3. The cut-off filter 15 is disposed on the base 17 and is adjacent to the second lens 14. The sensor 16 is disposed on a substrate 18, and the substrate 18 may be a printed circuit board or a flexible board. The base 17 is connected to the substrate 18, and the base 17 is adhesively packaged on the substrate 18.

Please refer to FIG. 2, since the cut-off filter lens 5 is adjacent to the sensing 16 ′, after the light enters from the aperture ία, it passes through the first lens 12, the first lens 14 and the cut-off lens 15, And the small particles of the cut-off lens element 5 will block the light, so that a part of the daylight on the sensor 16 (P1 xe 1) will have a shielding effect when it cannot receive the light, so that some of the daylight = degree It decreases, it affects the day image f. Therefore, at present, the cleanliness of the cut-off lens 15 is high, which makes the production yield low and the

Page 6 200537121 V. Description of the invention (2) '^ At present, in order to raise the yield of Nan'an ‘reducing costs’, some manufacturers try to cut off the filter film on the lens surface mine, but the manufacturing process is not easy. Some manufacturers also adopt the method of inserting the cut-off lens 15 between the first lens 12 and the second lens 14 and supporting each other with the ring lens', but this method is likely to cause assembly tolerances. When considering the use of the cut-off filter lens 15, the square-cut cut-off filter 15 is likely to cause the four corners of the filter lens to collide with the lens wall when it is placed in the circular barrel 11, resulting in tiny particles. If a circular cut-off filter lens 15 is used in order to avoid the aforementioned disadvantages, the cut-off yield of the round cut-off tear 15 is much lower than that of the square, and the cost is more square. The ancient manufacturing cost is also low. The cut-off filter lens 5 is arranged on the rear end of the dream tube 11 and is adjacent to the sensor 2 6 and the second lens 1 4. The cut-off lens 15 is set on the base 7. In the same way, the cleanliness requirements of the anti-filter lens 15 are also high, and the problem cannot be solved. In view of the above problems, the inventors of the present case are therefore eager to solve a problem that can solve the requirements of the high cleanliness of the cut-off filter lens and reduce the assembly tolerance that may also occur between the cut-off filter lens and the lens. "Image taking lens". ° (III) [Abstract] The object of the present invention is to provide an imaging lens that can solve the problem of high cost of lens production due to the high cleanliness requirements of the filter lens. In order to achieve the above object, the imaging lens according to the present invention includes a lens barrel, a first lens, a second lens, and a filter element. Mirror tube

$ 7 pages

200537121 V. Description of the invention (3) A first accommodating portion and an aperture ◦ The first lens is disposed in the first accommodating portion and includes a first surface of a first lens adjacent to the aperture. The second lens is disposed in the first accommodating portion, and there is a distance between the second lens and the first lens. The wave-wave module system 3 is placed in the first receiving portion and between the first lens and the second lens. … Continuing from the above, “The image taking lens of the present invention has a filtering component disposed between the first lens and the second lens. Compared with the conventional technology, the sensor does not produce a shielding effect when receiving light, so The requirements on cleanliness can be reduced, and the group I tolerance can also be reduced, so that the yield of the imaging lens in production is improved and the cost is reduced. (IV) [Embodiment] The following describes an image taking lens according to an embodiment of the present invention with reference to related drawings, wherein the same components will be described with the same reference symbols. . Moon tea%, as shown in FIG. 3 and FIG. 4 ′ The imaging lens 2 according to the embodiment of the present invention includes a lens barrel 21, a first lens 22, a second lens 23, a filter assembly 24, and a base 25. The lens barrel 21 includes a first accommodating portion 2m and an aperture 212, and is connected to the base 25. The base fin is connected to the-substrate 27 and the base 25 is adhered and packaged on the substrate 27. The substrate 27 may be a flexible printed circuit board. In the present invention, the optical adhesive is packaged on the substrate 27, and the method τ 杜 w% ^ cylinder 97 P e nea Other methods for making the base 25 adhere and package on the substrate 27 are included in the patent scope of the present invention. Slice first == slice. 'Money is placed in the first accommodating portion 211, and the first surface 221 of the first lens is a lens adjacent to the aperture 212.

Page 8 200537121 V. Description of the invention (4) The surface is a convex surface. The first lens 22 may be a glass lens or a plastic lens. In the embodiment of the present invention, the first lens 22 is a plastic lens: and is an aspherical lens. The second lens 23 is disposed in the first accommodating portion 21, and there is a distance between the first lenses 22. The second lens 23 may be a glass lens or a plastic lens. In the embodiment of the present invention, the second lens 23 is a plastic lens: and is an aspherical lens. The second lens 23 has a second lens second surface 231 ′, and the second lens second surface 231 is an inverse curved surface relative to a surface of the adjacent filter element 24.

The filter element 24 is disposed in the first receiving portion 21 and is located between the first lens 22 and the second lens 23. The thickness of the filter element 24 may be equal to the distance between the first lens 22 and the first lens 23. The filter assembly 24 includes a spacer 241 and a filter 242. The washer 241 is used to isolate stray light and has a second receiving portion 2411. In the embodiment of the present invention, the gasket 241 is a ring-shaped plastic object. Other gaskets of different materials and shapes that can be used to isolate stray light are included in the patent scope of the present invention.

The filter 242 is disposed in the second accommodating portion 241, and is used for filtering high-frequency and low-spectrum light waves which are not required for rain. The filter 242 may be an infrared cut filter (Infrared Rays FUter, IR Filter), an ultraviolet filter (Ultraviolet Fllter, UV fUter), an absorption filter, an optical filter (Absorbing FUter), or A low-pass filter (L〇w

Pass Fllter (LPF). In the embodiment of the present invention, the chirped wave plate 242 is an infrared cut-off filter. %

200537121 V. Description of the invention (5) The image pickup lens 2 may further include a sensor 26 disposed on the substrate 27. In the embodiment of the present invention, the sensor 26 may be a complementary metal oxide semi conductor sensor (CMOS sensor). As shown in FIG. 5, the imaging lens 2 may further include: One third lens 28. The third lens 28 is disposed in the first accommodating portion 211 and is located between the aperture 212 and the first lens 22 to improve the imaging quality. Please refer to FIG. 3 and FIG. 6, since the imaging lens 2 of the present invention includes a filter component 24 disposed between the first lens 22 and the second lens 23, and the filter component 24 includes a filter 242, so when the light Enter from aperture 212

After the 'passes the first lens 22, the filter 242, and the first gauge; the range of the six image light is enlarged, so the distance between the impurities of the filter 24 2 is also enlarged, and the imaging light received by the sensor 26 The shielding effect caused by the impurities on the filter sheet 242 is greatly reduced. Therefore, the requirements on the cleanliness of the filter sheet 242 can be reduced, which increases the production yield and reduces the production cost. In addition, since the filter plate 242 and the washer 241 are combined into f1, and pieces in the present invention, the assembly tolerance of the f lens 2 on the dream lens of the imaging lens 2 makes the two η: Gu Yi, reducing image acquisition A, the left will wait for delivery and raise production costs, reducing production costs. Too much: The above is only exemplary and not restrictive. Any without leaving

Mi spoon people ^ a i equivalent modifications or changes to them, ^ should be included in the scope of patent application attached. Ruler

Page 10 200537121 Brief description of the drawings (C5), [Simplified description of the drawings] Figure 1 is a schematic sectional view of one of the conventional imaging lenses; Figure 2 is a schematic diagram of the optical path of one of the conventional imaging lenses; Series 3 is one of the imaging lenses according to the embodiment of the present invention. ^ 口 J 曲 不 intentions. Figure 4 is the imaging lens according to the embodiment of the present invention.---------------------------------------------------------------------------------------------------------------------------------------------------------● Another embodiment of the imaging lens of the present invention: and an exploded cross-sectional view. FIG. 6 is an imaging lens according to an embodiment of the present invention, and the optical element is a schematic illustration of symbol elements. I: imaging lens II: lens barrel. III: accommodating part 112: aperture 12 first lens 13 washer 14 first lens 15 cut-off filter 'optical lens 16 sensor 17 base 18 substrate 2: imaging lens < 1

Page 11 200537121 Page 12 Schematic description 21: Aft. AvV Mirror Same as 211: Section--accommodating section 212: Aperture 22: First lens 221: Section--Lens first 23: Second lens 231: Second Two lenses second 2 4 ·· Filter module 241: washer 2411 •• second receiving section 242 • filter · wave plate 2 5 ·· base 26: sensor 27: base plate 2 8 ·· third lens

Claims (1)

200537121 ^, the scope of the patent application and adjacent to the aperture; and the second lens and the first lens 1. An image taking lens, the image taking lens includes a lens barrel, which has a first receiving portion and an aperture A first lens disposed on the first receiving portion, a second lens disposed on the first receiving portion, and a distance between the first lenses; and a filter component disposed on the first receiving portion; The first receiving portion is between the second lens and the second lens. 2. The imaging lens according to item 丨 of the patent application scope, wherein the filter element includes a washer and a filter. 3. The image taking lens according to item 2 of the scope of the patent application, wherein the filter and the wave plate are an infrared cut-off filter lens. 4. The imaging lens according to item 2 of the scope of patent application, wherein the ring has a second receiving portion, and the filter is disposed in the second receiving portion. 5. The image taking lens according to item 1 of the scope of patent application, wherein the first lens is an aspherical lens. 6. The imaging lens according to item 丨 of the patent application scope, wherein the first lens is a plastic lens. The imaging lens master described in item 1 of the scope of patent application, wherein the second lens < 1 200537121_ a — __ 6. The scope of patent application is an aspheric lens. 8. The imaging lens according to item 1 of the scope of patent application, wherein the second lens is a plastic lens. 9. The image taking lens according to item 1 of the scope of patent application, wherein the first lens includes a convex surface adjacent to the lens hole. 10. The image capturing lens according to item 1 of the scope of patent application, wherein the second lens includes an inverse curved surface with respect to a surface adjacent to the filter element. 1 11. The image capturing lens according to item 1 of the scope of patent application, wherein the thickness of the filtering component is approximately equal to the distance between the first lens and the second lens. 12. The imaging lens described in item 1 of the patent application scope further includes a base. 13. The imaging lens according to item 12 of the scope of patent application, wherein the lens barrel is connected to the base. The imaging lens according to item 1 of the scope of patent application, further comprising a second lens, and the third lens is disposed in the first accommodating portion and located between the aperture and the first lens. Page 14