TW498181B - Lens focusing method - Google Patents

Abstract

A lens focusing method is disclosed to improve the disadvantage of the conventional far-shot or near-shot, in which the zooming mechanism of the lens set is adjusted for accomplishing the clear image after focusing, but the mechanism design is complicated, the precision requirement and cost are high, the space occupied is large, the technology used is more difficult. The present invention can achieve the same function of clearness for image formed. By varying the device to add an optical flat glass at the rear side of lens or the part having coating treatment, the camera lens is made to be fixed, thus, by varying the thickness (or refractive index) of the optical flat or the back focal length (or image distance) formed by the part having coating treatment, the image position formed on the image sensor or film by far-shot or near-shot is the same, the overall structure is simple and easily to be adjusted, and the cost is reduced. Furthermore, it has the characteristic of being miniaturized without occupying large space.

Description

498181 V. Description of the invention (l) < Technical scope of the invention > Gai-Li! Provides an optical lens focusing method, especially-a method using ii = i =; = (Image sens ° r) or multi-light between negatives The thickness of the i-door processor, the optical flat glass or the mineral film processor 2 the glass or mineral film processor is placed on the lens and the image sensor, and the progenitor is imaged on the film: it is formed between the negatives and it is far away The close object can be accurate. In this way, the image can be clear and simple on the negative film to move the telescoping mechanism. The lens group can be adjusted for distance measurement. It is also very easy to adjust. With the use of glass, it is possible to switch the optical tablet completely automatically. Background explanation> Those who are clear: Cheng: Two i Image: Two, focus action (that is, to make the subject to be positive lens movement ΐ = elephant howl 1mage ―) or the film is adjusted to telephoto or close-up t mechanism rotation drive The mirror group moves back and forth to reach

The obstacle rate is also relatively complicated, and the design of the mechanical mechanism is relatively high, and the precision is relatively high. Therefore, the lens mechanism @: H j added the difficulty of the electronic driving operation, and the moving phase is relatively high. … To achieve the focus. Second, the hunting small motor power transmission drives the lens to expand and contract, i J 'However, the telescopic lens still needs to rely on the mechanical linkage in the lens, and its precision processing costs cannot be avoided, and the lens must be retracted. Page 4 ^ «181 ^« 181 Description of the invention (2) It is indeed difficult to determine the space distance. It is difficult for the disadvantaged and inventors of the present invention to design and manufacture optical and camera and related products for many years, and they know the principles The manufacturing method and its advantages and disadvantages are devoted to research and improvement, to break the bottlenecks of traditional technology, to improve the technical level, and to make the camera more practical. After years of hard research and repeated trials, the invention of r Optical lens focusing method ". < Brief description of the invention > A main object of the present invention is to provide a method for focusing an optical lens by improving the technical level of the camera and bottle chanting, wherein the lens group can be made into a fixed type, so as to save its mechanical tradition. The complex structure of linkage, and its long and close shots are made by changing the thickness of the plate glass between the lens and the negative, and changing its back focus value (or image distance), so that the object to be shot can be accurately and clearly imaged on the image sensor (Image sensor) or film, it breaks through the bottleneck of traditional technology and changes the structure of traditional complicated mechanical linkage to achieve the functions of cost reduction, space reduction, simple operation and technological improvement, which are its characteristics. -Regarding the technology, means and effects used in the present invention, a better example will be given in conjunction with the detailed description of the drawings. It is believed that the above-mentioned purpose structure and characteristics of the present invention can be obtained in-depth and specific. Understanding. < Detailed description of the invention > ^ The invention provides a designer of an optical lens focusing method. In order to make it possible to further understand the structural design and technology of the present invention, I would like to explain it with 0 diagrams later: # 佛 I1, the master focusing action, in the past, it has been rotated with complex mechanical mechanisms. Move to reach the most appropriate for long or close shots

498181 V. Description of the invention (3) Focusing position 'and get a clear image. This way, because the mechanical leaf is complicated and the precision is high, it increases the difficulty of bean production: the expansion and contraction caused the volume to be ineffective. It is shown that the following principles of the present invention can be used to obtain η (ί)) 1 ”: parallel optical flat glass breaking or coating (1 0) ~, the degree of residence is d (_), and the refractive index is n, set a—or film image sensing 11 p, will increase to between and its imaging position changes from P to [(nl) / n] ^ d (mm) as shown in Figure 1. (2) • For the same lens, the distance (or distance) of the focus is shorter when the distance is r ± + ± away, and the thickness of J: the principle of the point, and the distance of 0) is assumed. Then, when taking a close-up shot, the focus position (or image distance) is longer when the distance between the two. (The object is closer (3). Similarly, using the above-mentioned (work) formula By changing the optical flat glass or the coating process, the focus position (or image distance) of the lens can be changed, and the back focus value (or image distance) of the focus position is 丨 A '

The focus value (or image distance) of the focusing position is 丨 A 丨 + 丨 R and the difference is 丨 B 丨. 1 B If the optical system contains a flat glass or a film-coated person (the refractive index is changed by two) d | As long as the degree of the first learned flat glass or coated film

The processor, I B I ^ can reach the indicated; and make [(η-1) / n] * can complete the oblique 丨 △ d 丨 focus movement without moving the lens 5 times.

As shown in Figures 2 and 3, the optical flat glass or the mineralized film (as shown in Figure 2), the thickness is because when you shoot a distant object, add—

(1 η, / X V 1 〇) (including those who have been coated) Γ △ d and make n ^ l) / n) * | Ad | ^ iR1 dry the optical level of this thickness △ d 4

), Those who have broken the glass or have been coated (1C

:: You can get the focus position when taking a close shot (as shown in Figure 3). As long as the thickness of the optical flat glass or the coated processor (10) is changed, the thickness of the optical flat glass or the coated processor is different no matter where the object is to be photographed. △ d can satisfy [(η ~ ι) / η] * | Δ (1 |: = |] Β |. Then the focusing action of the lens can be achieved. 丨 B I: When shooting different distance objects, the lens needs to focus Distance difference

3 · Let's take an example to explain that the existing lens can obtain the corresponding focusing distance for the position of the object. The relevant data is as follows:

Page 7 498181 V. Description of the invention (5) Focus distance behind the lens (mm) Infinity 4 * 40 4 Μ 4 · 4 3 1 Μ 4 · 4 4 6 0 C Μ 4 · 4 7 3 0 C Μ 4 · 5 3 2 0 C Μ 4 · 6 0 1 0 C Μ 4 · 8 0 According to the above data: (a) When the object distance is 4M and 30CM, the difference in the back focus value is: 4 · 53-4 · 43 = 0 · 10 (mm) (b) If the object distance is between 30CM and 20CM, the difference in the back focus value is: 4.60-4 · 53 = 0.07 (mm) (c) If the object distance is between 20CM and 10CM , The difference between the back focus values is: 4.80-4.60 = 0.20 (mm) Now when the object distance = 4 Μ, put a thickness = 2 · Omm refractive index η = 1 · 52 between the lens and the imaging surface Various optical flat plates

Shui

IB 氺 498181 V. Description of the invention (6) For glass or coating, then lens 4 · 43 + [(1 · 52-1) / 1 · 52] * 2 · 0 ^ 5 · 11 ) It can be seen that when the object distance = degree = 2 · Omm refractive index n = 1 · 5 The thickness of the mineral film processor is changed to 1 = 7mm Optical flat glass or the film processor, this 4 · 43 + 0 · 1 + [( 1 · 52- 1) / 1. 52] Wooden 1. 7% We use the principle of [(1 · 52- 1) / 1 · 52] * (2 · 0-1 · 7) = 0.1 to reach the lens Does not move, but the object distance from 4 back focus value increased by 0.1 mm. It can be proved by the same reason as in case (b), when the object is CM, the optical person with thickness = 1. 52-1) / 1 · 52] * (1 · 7-1 · 5)% 〇 At this time, the back focus value becomes 4.53 + 0 · 〇7 + [(1 · 52-1) /1.52] * 1 · 5 ^ It is known from case (c) that when the object distance is switched from 2 〇 to an optical thickness = 0.9 mm, then η-1) / η [(1 · 52-1) / 1 · 52] * ( 1 · 5-0 · 9)% 〇 At this time the back focus value becomes the back focus value (mm) 3 0 C Μ, we will be 2 thick optical flat glass or refractive index η = 1 · 5 2 When the back focus value of the lens becomes 5.11 (mm) (mm) Μ to 30 C Μ, the distance from 30CM to 20 glass flat glass or glass with mineral film, then △ d | .07 (mm) ^ 5.11 (mm) 〇 CM becomes 10CM, flat glass or coated Δ d I • 20 (mm)

Page 9 of 4981 »i V. Description of the invention (7)" o + uo + mmvuwuy u (_). The following 计 原 原 ㉟ 'can be done on the camera or digital camera mechanism, and its related configuration diagram of the present invention , The most known in the basin is the steamed bun (40), followed by the cat's second change mechanism (50), i de a λ push; $ It is similar to cut Π-.e sensor) Ϊ: Ϊ 转 ί Ϊ 转Or draw-type or other similar switching mechanism (50), and if it is combined with the distance-sensing device S, it can become completely self-m. The precision of the numerical value can be more according to the required effect. &Quot; Again =, right If you need to achieve more precise results, you can set more for optical flat glass or those who have been coated. Otherwise, there are fewer, but the difference is very small, just the effect of depth of field can be seen. See Figure 5 for its The front view of the rotation switching mechanism. There are several optical plate glasses on the top of the ^ rotation switching mechanism (50). ^ Coated (10), each optical plate glass or coated (1〇) ) Have different thicknesses, such as 0.9mm, 1.5mm 1 · 7mm '2 · Omm. Please refer to Figure 4 for details. The optical flat glass or coated processor (1 0) is aligned with the lens (40), imaging surface (30) (Image sensor or negative), and if the subject is closer, adjust the k $ 's optics Plate glass or film-coated person (10), while the subject vehicle driver adjusts the thicker glass plate glass or film-coated person (10)

498181

The clear image makes it easier and more cost-effective. In this way, the failure rate can be set and re-arranged. For each different coated glass or distance, the parameter can be switched, and the discount is 0. 6 One implementation of each of the eight optical 'or fold processors has been coated for adjustment. Read the 8th mechanism (emissivity, front view of the example shown in Figure 7). The flat panel has different emissivity (10). , 5 〇), the same as the optical show, is another implementation of its rotation switching mechanism 'wherein the rotation switching mechanism (50) on the glass or coated (1 0) or coated or processed (1 0 The thickness of the optical flat glass of Figure 6 can be made into a circle, and the optical flat glass of Figure 7 can be made into a square, so that more shooting switching mechanisms (50) can be set. The Chengping pumping mechanism (50) is capable of arranging thick flat glass or film-coated processors (10). In summary, the invention of the present invention is a highly creative use of the technical ideas of natural laws. Has the invention patent requirements Apply. The above-mentioned implementation examples are merely used to illustrate the present invention, so that, without departing from the spirit of the present invention, various deformations, modifications and applications made by those skilled in the art should be included in the scope of the present invention .

498181 Brief description of the drawings < Simple description of the drawings > Figure 1: It is a schematic diagram showing the relationship between the flat glass and the imaging position of the focusing method of the optical lens of the present invention. Fig. 2: Schematic diagram of shooting a distant object with the optical lens focusing method of the present invention ○ Fig. 3: Schematic diagram of shooting a close object with the optical lens focusing method of the present invention 〇 Fig. 4: Relevant configuration diagram of the optical lens focusing method of the present invention. Fig. 5 is a front view of an embodiment of a switching mechanism for a focusing method of an optical lens of the present invention. Fig. 6 is a front view of another embodiment of the switching mechanism of the focusing method of the optical lens of the present invention. Fig. 7 is a front view of yet another embodiment of a switching mechanism for a focusing method of an optical lens of the present invention. Fig. 8 is a front view of another embodiment of a switching mechanism for a focusing method of an optical lens of the present invention. < Illustration of drawing number of the drawing >

(1 0) Optical flat glass or coated processor (2 0) Optical system (3 0) Imaging surface (Image sensor or negative) (4 0) Lens (5 0) Rotary switching mechanism No. 12 page

Claims (1)

498181 89106274, patent application scope A photochemical, the light surface; the change of Dali, after the focal position IA | + If the plate glass is changed (changing the processor, IB | = can be achieved because of the reason, thick ((η ~ then take this to get a photo The same thickness but the optical plate [(η-or refractive index of an optical plate, glass, glass, plate, glass, optical plate can be used to change the lens focal value 丨 AIB 丨, two at long shots, the head autofocus method, installed or For those who have been treated with mineral film, one exhibits two or more. Or for those who have been treated with film and whose refractive index has changed from the learning system and the imaging glass or the focusing lens factory of the filmed i head or refractive index i, then take a close-up shot. Time, the difference between the adjustments is / 丨,: the focal position and the back focal value are optical systems that contain sores or have been coated (refractive index 丨 optics |) I d— ΛΗ丨 ") 'When taking close-up shots, you only need to make Λ rl I / 1 free, π 4 you can get optical flat glass or coated [(η-1) / without moving the lens can be used when shooting distant objects Where the degree is △ d and 1) / η] 氺 | To change the refractive index of the optical plane, change 1) / η] 氺 | at the glass or the coated place, it can reach η] * 丨 △ d | complete the focusing action; add an optical flat glass or coated place △ d丨 = | b | For flat glass or coated processors, the thickness of the plate glass or coated processors, or wherever the object to be photographed, can make the thickness difference between the two of them △ d can satisfy △ d 丨 = 丨B 丨 Focus actor to the lens. mu iMi Page 13 Case No. 89106274 1 seat PκΛ.1 Done correction 6. Application scope of patents //: Age 2 · According to the scope of patent application / 1 of the optical lens autofocus method described above, where the optical flat glass has been The coating processor must be round or square or other geometric shapes. 498181