Telescopic camera obscura

Abstract

The utility model provides a telescopic camera obscura. The telescopic camera obscura comprises a telescopic cylinder, an imaging device and a shading plate, the shading plate is arranged at one end of the telescopic cylinder, the shading plate and the imaging device are arranged in the telescopic direction of the telescopic cylinder, the imaging device is connected with the telescopic cylinder, and the imaging device is a semitransparent device; the light shielding plate is provided with a light inlet hole, and the light inlet hole transmits light on an external object to the imaging device so as to present the appearance of the object on the imaging device. According to the utility model, the realization of the telescopic camera obscura is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of imaging equipment, in particular to a retractable dark box. Background Art

[0002] The dark box is mainly a viewing dark box made according to the principle of pinhole imaging, also known as an optical dark box. When light from an object shines into the interior of the optical dark box through the pinhole at one end of the optical dark box, the image of the object will be projected onto the projection board at the other end of the optical dark box.

[0003] However, the existing optical darkbox is large in size and inconvenient to carry. Utility Model Content

[0004] In order to solve the above problems, the telescopic dark box provided by the utility model supports the imaging device and the shading plate by arranging a telescopic tube, so that the optical box can be easily carried.

[0005] The utility model provides a retractable dark box, which comprises a retractable tube, an imaging device and a light shielding plate;

[0006] The shading plate is arranged at one end of the telescopic tube, the shading plate and the imaging device are arranged along the telescopic direction of the telescopic tube, the imaging device is connected to the telescopic tube, and the imaging device is a semi-transparent device;

[0007] A light entrance hole is provided on the shading plate, and the light entrance hole transmits light from external objects to the imaging device to present the appearance of the object on the imaging device.

[0008] Optionally, the retractable dark box further comprises: a convex lens;

[0009] The convex lens is located in the light entrance hole and connected to the light shielding plate.

[0010] Optionally, the maximum distance between the imaging device and the convex lens is greater than or equal to the focal length of the convex lens and less than twice the focal length, where twice the focal length is twice the length of the focal length of the convex lens.

[0011] Optionally, the convex lens is coaxial with the light entrance hole, the telescopic tube and the imaging device.

[0012] Optionally, the focal length of the convex lens is 15 cm, the cross section of the telescopic tube perpendicular to the telescopic direction is a square with a side length of 15 cm, the maximum length that the telescopic tube can be extended is 30 cm, and the maximum distance between the imaging device and the convex lens is 17 cm.

[0013] Optionally, the cross-sectional shape of the telescopic cylinder perpendicular to the telescopic direction is circular or polygonal.

[0014] Optionally, the imaging device is frosted glass, translucent paper or translucent plastic plate.

[0015] Optionally, the imaging device is located inside the telescopic cylinder;

[0016] The telescopic dark box also includes a support frame, which is fixedly arranged at the other end of the telescopic tube, and the support frame and the telescopic tube are coaxial.

[0017] Optionally, the telescopic cylinder is a light-proof device.

[0018] Optionally, the telescopic cylinder is a bellows.

[0019] The telescopic dark box provided by the embodiment of the utility model supports the imaging device and the shading plate by setting a telescopic tube. When the optical box is carried, the telescopic tube can be compressed first to reduce the overall size of the optical box, thereby facilitating the carrying of the optical box. When the optical box needs to be used, the telescopic tube only needs to be stretched and the position of the imaging device relative to the shading plate can be adjusted, so that the viewer can view the image projected on the imaging device from the other end of the telescopic tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a schematic cross-sectional view of a retractable dark box according to an embodiment of the present application;

[0022] Figure 2 This is a schematic structural diagram of a retractable dark box in an embodiment of the present application in a stretched state;

[0023] Figure 3 This is a schematic structural diagram of a retractable dark box in a compressed state according to an embodiment of the present application;

[0024] Figure 4 This is a schematic structural diagram of a retractable dark box according to an embodiment of the present application.

[0025] Reference numerals:

[0026] 1. Telescopic tube; 2. Imaging device; 3. Sunshade; 31. Light entrance hole; 4. Convex lens; 5. Support frame. DETAILED DESCRIPTION

[0027] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0029] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatially relative terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0030] It should be noted that when an element is referred to as being "fixedly connected" to another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0031] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0032] The utility model provides a retractable dark box according to an embodiment of the present invention. Figure 1 and Figure 2The retractable darkroom includes: a retractable tube 1, an imaging device 2 and a shading plate 3.

[0033] The shading plate 3 is arranged at one end of the telescopic tube 1 . The shading plate 3 and the imaging device 2 are arranged along the telescopic direction of the telescopic tube 1 . The imaging device 2 is connected to the telescopic tube 1 . The imaging device 2 is a semi-transparent device.

[0034] The light shielding plate 3 is provided with a light entrance hole 31. The light entrance hole 31 transmits light from an external object to the imaging device 2, so as to present the appearance of the object on the imaging device 2.

[0035] It should be noted that the specific structure of the telescopic tube 1 can be a telescopic structure in which multiple sleeves are connected to each other, such as the telescopic structure of a monocular telescope, or it can be a bellows that can be telescoped along the length direction, but is not limited to this; the translucent device can be a device whose material itself is a translucent material, such as a translucent plastic plate; the translucent device can also be a device whose material itself is a transparent material, and its surface is finally formed into a device with translucent properties after chemical or physical treatment, such as frosted glass; the translucent device can also be a device whose structure itself makes the device have translucent properties, such as sulfuric acid paper, etc.; the cross-sectional shape of the telescopic tube 1 perpendicular to the telescopic direction is circular or polygonal.

[0036] In addition, the telescopic cylinder 1 can be made of metal or plastic. At the same time, the telescopic cylinder 1 is a light-proof device. It can be understood that the light-proof device can be a device whose material is a light-proof material, such as a light-proof plastic plate; the light-proof device can also be a device whose material is a transparent material, and its surface is coated with a light-proof material so that the device is finally a light-proof device.

[0037] It should be noted that the shading plate 3 covers one end of the telescopic tube 1, that is, the shading plate 3 blocks the opening at one end of the telescopic tube 1, so that external light can only pass through the light entrance hole 31 through one end of the telescopic tube 1 and project onto the imaging device. The shading plate 3 can be fixedly connected to the telescopic tube 1 by an adhesive, or can be detachably connected to the telescopic tube 1 by screws, buckles or magnets.

[0038] In this embodiment, the shading plate 3 is magnetically connected to the telescopic tube 1 through a magnet, and the cross-section of the telescopic tube 1 perpendicular to the telescopic direction is a square. The shading plate 3 and the imaging device 2 are also square in shape; the imaging device 2 is frosted glass, and the telescopic tube 1 is a corrugated tube made of black plastic. By setting the telescopic tube 1 as an opaque device, the imaging effect of foreign objects on the imaging device 2 can be improved, making the image presented on the imaging device 2 clearer.

[0039] When carrying the optical box, the telescopic tube 1 is first compressed to shrink the entire optical box, thereby facilitating the carrying of the optical box. When the optical box needs to be used, the telescopic tube 1 is simply stretched, and the position of the imaging device 2 relative to the light shielding plate 3 is adjusted. The light from the external object is irradiated onto the imaging device 2 through the light entrance hole 31, and the appearance of the external object can be reproduced on the imaging device 2, so that the viewer can view the image projected onto the imaging device 2 from the other end of the telescopic tube 1.

[0040] The imaging device 2 can be fixedly connected to the telescopic tube 1 by an adhesive, or can be detachably connected to the telescopic tube 1 by screws, buckles or magnets. When the imaging device 2 is detachably connected to the telescopic tube 1, it is not only convenient to replace and maintain the imaging device 2, but also the relative distance between the imaging device 2 and the shading plate 3 can be flexibly adjusted according to the actual scene.

[0041] In this embodiment, the imaging device 2 is located inside the telescopic tube 1 and is magnetically connected to the telescopic tube 1 through a magnet. By arranging the imaging device 2 inside the telescopic tube 1, the imaging device 2 is not directly exposed to the external environment, thereby further improving the imaging effect of the imaging device 2.

[0042] Combination Figure 3 The retractable dark box further comprises: a convex lens 4. The convex lens 4 is located in the light entrance hole 31 and connected to the light shielding plate 3.

[0043] It should be noted that the convex lens 4 is coaxial with the light entrance hole 31, the telescopic tube 1 and the imaging device 2; the maximum distance between the imaging device 2 and the convex lens 4 is greater than or equal to the focal length of the convex lens 4, and less than twice the focal length, and the twice focal length is twice the length of the focal length of the convex lens 4; the convex lens 4 is located in the light entrance hole 31, which means that the convex lens 4 completely fills the light entrance hole 31, and the convex lens 4 can be fixedly connected to the light shielding plate 3, or can be detachably connected to the light shielding plate 3. When the convex lens 4 is detachably connected to the light shielding plate 3, the convex lens 4 with different focal lengths can be replaced according to different actual application scenarios.

[0044] In this embodiment, the convex lens 4 is fixedly connected to the shading plate 3, the diameter of the convex lens 4 is 5 cm, the focal length of the convex lens 4 is 15 cm, the cross section of the telescopic tube 1 perpendicular to the telescopic direction is a square with a side length of 15 cm, the maximum length that the telescopic tube 1 can be extended is 30 cm, and the maximum distance between the imaging device 2 and the convex lens 4 is 17 cm. The imaging effect of the imaging device 2 can be further improved by providing the convex lens 4.

[0045] Combination Figure 4The telescopic dark box further comprises a support frame 5, which is fixedly arranged at the other end of the telescopic cylinder 1, and the support frame 5 is coaxial with the telescopic cylinder 1. In this embodiment, the support frame 5 is a square frame adapted to the other end of the telescopic cylinder 1. The stability of the telescopic dark box structure can be increased by setting the square frame.

[0046] The retractable dark box provided in this embodiment is not only easy to carry, but also has a simple structure, is easy to manufacture, and has a low manufacturing cost. At the same time, the retractable dark box can flexibly adjust the distance between the imaging device 2 and the convex lens 4, so that when the distance between the imaging device 2 and the convex lens 4 changes, the viewer can observe the change in the blur degree of the image presented on the imaging device 2 on the imaging device 2, which is particularly suitable for use as a teaching aid to enhance the interest of teaching.

[0047] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0048] 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.

[0049] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A retractable dark box, characterized in that: The retractable dark box comprises: a retractable tube, an imaging device and a light shielding plate; The shading plate is arranged at one end of the telescopic tube, the shading plate and the imaging device are arranged along the telescopic direction of the telescopic tube, the imaging device is connected to the telescopic tube, and the imaging device is a semi-transparent device; The shading plate is provided with a light entrance hole, and the light entrance hole transmits light from an external object to the imaging device, so as to present the appearance of the object on the imaging device.

2. The retractable dark box according to claim 1, characterized in that: The retractable dark box also includes: a convex lens; The convex lens is located in the light entrance hole and connected to the light shielding plate.

3. The retractable dark box according to claim 2, characterized in that: The maximum distance between the imaging device and the convex lens is greater than or equal to the focal length of the convex lens and less than twice the focal length, where the twice focal length is twice the length of the focal length of the convex lens.

4. The retractable dark box according to claim 2, characterized in that: The convex lens is coaxial with the light entrance hole, the telescopic tube and the imaging device.

5. The retractable dark box according to claim 2, characterized in that: The focal length of the convex lens is 15 cm, the cross section of the telescopic tube perpendicular to the telescopic direction is a square with a side length of 15 cm, the maximum length that the telescopic tube can be extended is 30 cm, and the maximum distance between the imaging device and the convex lens is 17 cm.

6. The retractable dark box according to claim 1, characterized in that: The cross-sectional shape of the telescopic cylinder perpendicular to the telescopic direction is circular or polygonal.

7. The retractable dark box according to claim 1, characterized in that: The imaging device is frosted glass, translucent paper or translucent plastic plate.

8. The retractable dark box according to claim 1, characterized in that: The imaging device is located inside the telescopic cylinder; The telescopic dark box further comprises a support frame, which is fixedly arranged at the other end of the telescopic tube, and the support frame is coaxial with the telescopic tube.

9. The retractable dark box according to claim 1, characterized in that: The telescopic cylinder is a light-proof device.

10. The retractable dark box according to any one of claims 1 to 9, characterized in that: The telescopic cylinder is a bellows.

Images