10-time zoom detection lens

Abstract

The utility model discloses a 10-time zoom detection lens, which relates to the technical field of detection lenses and comprises an optical fiber, a focusing group, a diaphragm, a zoom group and a compensation group. The number of the lenses of the focusing group, the zooming group and the compensation group is one; the focusing group, the diaphragm, the zooming group and the compensation group are sequentially arranged on an emergent light path of the optical fiber; light emitted from the optical fiber enters the focusing group, the aperture angle of the light is limited by the diaphragm after the light is converged by the focusing group, and then the light is emitted after sequentially passing through the zooming group and the compensation group; the relative positions of the optical fiber, the focusing group and the diaphragm are unchanged; the angle of light irradiated on the compensation group and the aperture size of a light spot are changed through the position movement of the zooming group, the compensation group is linked with the zooming group, the compensation group performs integral compensation on aberration caused by the movement of the zooming group, and a continuous 10-time optical zooming process with a field angle of 0.06-0.6 degree is realized. According to the utility model, the size, the weight and the lens number of the zoom detection lens are reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of detection lenses, in particular to a 10-fold zoom detection lens. Background Art

[0002] In the existing zoom detection lens, a large number of lenses are provided to achieve zooming, which makes the zoom detection lens have the disadvantages of being large in size, heavy in weight and high in cost. Utility Model Content

[0003] The utility model aims to provide a 10-fold zoom detection lens, which reduces the volume, weight and number of lenses of the zoom detection lens and reduces the preparation cost.

[0004] To achieve the above purpose, the utility model provides the following solutions:

[0005] A 10x zoom detection lens, comprising: an optical fiber, a focusing group, an aperture, a zoom group and a compensation group; the number of lenses of the focusing group, the zoom group and the compensation group are all 1;

[0006] The focusing group, the aperture, the zoom group and the compensation group are sequentially arranged on the outgoing light path of the optical fiber;

[0007] The light emitted from the optical fiber enters the focusing group, and after the focusing group converges the light, the aperture angle of the light is limited by the aperture, and then the light passes through the zoom group and the compensation group in sequence before being emitted;

[0008] During the zooming process, the relative positions of the optical fiber, the focusing group and the aperture remain unchanged; the angle of the light irradiated on the compensation group and the size of the spot aperture are changed by moving the position of the zoom group. The compensation group is linked with the zoom group, and the compensation group compensates for the aberration caused by the movement of the zoom group as a whole, thereby realizing a continuous 10x optical zoom process with a field of view angle of 0.06°-0.6°.

[0009] Optionally, the lens of the focusing group is a positive lens.

[0010] Optionally, the lens of the zoom group is a negative lens.

[0011] Optionally, the lenses of the compensation group are positive lenses.

[0012] Optionally, the lenses of the focusing group, the zoom group and the compensation group are all coated with anti-reflection films.

[0013] Optionally, the aperture angle of the light emitted from the optical fiber is ±11°, and the corresponding relative aperture is F / #2.6.

[0014] Optionally, the light emitted by the optical fiber is green light with a wavelength range of 515nm-535nm, red light with a wavelength range of 615nm-635nm, or blue light with a wavelength range of 450nm-470nm.

[0015] Optionally, the optical fiber is a light-homogenizing optical fiber.

[0016] Optionally, the aperture is a light-transmitting circular hole.

[0017] According to the specific embodiments provided by the utility model, the utility model discloses the following technical effects:

[0018] The utility model discloses a 10x zoom detection lens, comprising: an optical fiber, a focusing group, an aperture, a zoom group and a compensation group; the number of lenses of the focusing group, the zoom group and the compensation group are all 1; the focusing group, the aperture, the zoom group and the compensation group are sequentially arranged on the optical path of the optical fiber; the light emitted from the optical fiber enters the focusing group, the focusing group converges the light, the aperture angle of the light is limited by the aperture, and then the light sequentially passes through the zoom group and the compensation group and then emerges; the relative positions of the optical fiber, the focusing group and the aperture remain unchanged; the angle of the light irradiated on the compensation group and the size of the aperture of the light spot are changed by moving the position of the zoom group, the compensation group is linked with the zoom group, the compensation group performs overall compensation for the aberration caused by the movement of the zoom group, and a continuous 10x optical zoom process with a field angle of 0.06°-0.6° is realized. Compared with the existing zoom detection lens which has many lenses, the focus group, zoom group and compensation group in the utility model only need one lens each to achieve 10 times optical zoom, which reduces the volume, weight and number of lenses of the zoom detection lens and reduces the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a 10x zoom detection lens provided in an embodiment of the utility model;

[0021] Figure 2 This is the optical path diagram when the field of view angle is 0.06°;

[0022] Figure 3 This is the optical path diagram when the field angle is 0.09°;

[0023] Figure 4 This is the optical path diagram when the field of view angle is 0.12°;

[0024] Figure 5 This is the optical path diagram when the field of view angle is 0.15°;

[0025] Figure 6 This is the optical path diagram when the field of view angle is 0.3°;

[0026] Figure 7 This is the optical path diagram when the field of view angle is 0.6°;

[0027] Figure 8 This is a comparison diagram of the optical path when the field of view angle is 0.06°-0.09° zoom.

[0028] Explanation of symbols:

[0029] Fiber optic—1, focusing group—2, iris—3, zoom group—4, compensation group—5. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The utility model aims to provide a 10-fold zoom detection lens, aiming to reduce the volume, weight and number of lenses of the zoom detection lens, thereby reducing the preparation cost.

[0032] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] like Figure 1 As shown, a 10x zoom detection lens in this embodiment includes: an optical fiber 1, a focusing group 2, an aperture 3, a zoom group 4 and a compensation group 5; the number of lenses in the focusing group 2, the zoom group 4 and the compensation group 5 is 1.

[0034] The focusing group 2 , the aperture 3 , the zoom group 4 and the compensation group 5 are sequentially arranged on the outgoing light path of the optical fiber 1 .

[0035] The light emitted from the optical fiber 1 enters the focusing group 2. After the focusing group 2 converges the light, the aperture angle of the light is limited by the aperture 3. Then, the light passes through the zoom group 4 and the compensation group 5 in sequence and then is emitted.

[0036] During the zooming process, the relative positions of the optical fiber 1, the focusing group 2 and the aperture 3 remain unchanged; the angle of the light irradiated on the compensation group and the size of the spot aperture are changed by moving the position of the zoom group 4. The compensation group 5 is linked with the zoom group 4 to compensate for the aberration caused by the movement of the zoom group 4 as a whole, thereby realizing a continuous 10x optical zoom process with a field of view angle of 0.06°-0.6°.

[0037] Specifically, the optical path diagrams corresponding to several different field of view angles during the continuous 10x optical zoom process with a field of view angle of 0.06°-0.6° are as follows: Figure 2-Figure 7 As shown. Figure 8 The optical path comparison diagram when the field of view angle is 0.06°-0.09° zoom further explains the zoom process:

[0038] Light is emitted from optical fiber 1 and enters focusing group 2. Focusing group 2 converges the light and then emits it. After passing through aperture 3, it enters zoom group 4. When zooming from 0.06° to 0.09°, zoom group 4 moves to the left, making the light entering zoom group 4 more convergent. The light emitted from zoom group 4 and entering compensation group 5 is also more convergent. Compared with the field of view angle of 0.06°, the spot aperture when the field of view angle is 0.09° is reduced. The light emitted from zoom group 4 passes through compensation group 5. At this time, compensation group 5 compensates for the aberration caused by the movement of zoom group 4 in the new position, so that the 10x zoom detection lens obtains the output light with a field of view angle of 0.09°. Figure 8 It can be seen that the effective aperture of the lens exit surface becomes smaller when the field angle is 0.09° compared to when the field angle is 0.06°.

[0039] The zoom process can be calculated using the conservation of optical etendue:

[0040] E=πAsin(θ / 2) 2 .

[0041] Where, E is the optical extension; π is the circumference; A is the effective aperture of the lens exit surface; θ is the field of view angle.

[0042] When zooming, when the field angle θ changes from 0.06° to 0.09°, when θ increases, the aperture A of the lens exit surface will become smaller while the optical expansion E of the system remains unchanged.

[0043] Specifically, the relative positions of the optical fiber 1, the focusing group 2 and the aperture 3 remain unchanged so that the maximum aperture angle through the aperture 3 remains unchanged, and the light emitted by the optical fiber 1 within the maximum aperture angle range can be 100% utilized without losing lighting efficiency.

[0044] As an optional implementation, the lens of focusing group 2 is a positive lens.

[0045] As an optional implementation, the lens of zoom group 4 is a negative lens.

[0046] As an optional implementation, the lenses of compensation group 5 are positive lenses.

[0047] As an optional implementation, the lenses of the focusing group 2 , the zoom group 4 and the compensation group 5 are all coated with an anti-reflection film.

[0048] Specifically, the anti-reflection film is a high damage threshold anti-reflection film achieved through a special coating process. It can increase the light resistance of the lens and improve the light resistance of the entire lens. The output brightness exceeds 2000 lumens and has passed the reliability test.

[0049] As an optional implementation, the aperture angle of the light emitted by the optical fiber 1 is ±11°, and the corresponding relative aperture is F / #2.6.

[0050] As an optional implementation, the light emitted by the optical fiber 1 is green light with a wavelength range of 515nm-535nm, red light with a wavelength range of 615nm-635nm, or blue light with a wavelength range of 450nm-470nm.

[0051] Specifically, by adjusting the surface curvature values ​​of the lenses of the focusing group 2, the zoom group 4 and the compensation group 5, a 10x continuous optical zoom effect can be achieved for green light with a wavelength range of 515nm-535nm, red light with a wavelength range of 615nm-635nm or blue light with a wavelength range of 450nm-470nm.

[0052] As an optional implementation, the optical fiber 1 is a light-homogenizing optical fiber 1 .

[0053] Specifically, the light homogenizing optical fiber 1 is used to achieve a homogenized light source, and the lens emits a highly uniform light spot, and the uniformity is measured to be greater than 95%.

[0054] As an optional implementation, the aperture 3 is a light-transmitting circular hole.

[0055] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] This article uses specific examples to illustrate the principle and implementation of the utility model. The above examples are only used to help understand the device and its core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A 10x zoom detection lens, characterized in that: include: An optical fiber, a focusing group, an aperture, a zoom group and a compensation group; the number of lenses of the focusing group, the zoom group and the compensation group are all 1; The focusing group, the aperture, the zoom group and the compensation group are sequentially arranged on the outgoing light path of the optical fiber; The light emitted from the optical fiber enters the focusing group, and after the focusing group converges the light, the aperture angle of the light is limited by the aperture, and then the light passes through the zoom group and the compensation group in sequence before being emitted; During the zooming process, the relative positions of the optical fiber, the focusing group and the aperture remain unchanged; the angle of the light irradiated on the compensation group and the size of the spot aperture are changed by moving the position of the zoom group. The compensation group is linked with the zoom group, and the compensation group compensates for the aberration caused by the movement of the zoom group as a whole, thereby realizing a continuous 10x optical zoom process with a field of view angle of 0.06°-0.6°.

2. The 10x zoom detection lens according to claim 1, characterized in that: The lens of the focusing group is a positive lens.

3. The 10x zoom detection lens according to claim 1, characterized in that: The lens of the zoom group is a negative lens.

4. The 10x zoom detection lens according to claim 1, characterized in that: The lenses of the compensation group are positive lenses.

5. The 10x zoom detection lens according to claim 1, characterized in that: The lenses of the focusing group, the zoom group and the compensation group are all coated with anti-reflection films.

6. The 10x zoom detection lens according to claim 1, characterized in that: The aperture angle of the light emitted by the optical fiber is ±11°, and the corresponding relative aperture is F / #2.

6.

7. The 10x zoom detection lens according to claim 1, characterized in that: The light emitted by the optical fiber is green light with a wavelength range of 515nm-535nm, red light with a wavelength range of 615nm-635nm, or blue light with a wavelength range of 450nm-470nm.

8. The 10x zoom detection lens according to claim 1, characterized in that: The optical fiber is a light-homogenizing optical fiber.

9. The 10x zoom detection lens according to claim 1, characterized in that: The aperture is a light-transmitting circular hole.

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