Anti-condensation optical device

Abstract

The invention provides an optical device capable of preventing condensation. The optical device comprises a shell, light-transmitting glass and a lens structure. The shell is provided with a first ventilation part, and the first ventilation part can communicate with the interior and the exterior of the shell. The light-transmitting glass has an inner surface, and the inner surface of the light-transmitting glass faces the interior of the shell and is combined with the shell. The lens structure is contained in the shell, and a cavity is formed between the lens structure and the shell and the inner surface of the light-transmitting glass. An airflow inlet and outlet path can be formed between the cavity and the outer portion of the shell and can be adjusted so as to control whether airflow can enter and exit the cavity and the outer portion of the shell through the first ventilation part or not.

Description

Technical Field

[0001] The present invention relates to an optical device, and in particular to an optical device for preventing condensation. Background Art

[0002] With the advancement of technology, the application of optical devices is becoming more and more diverse. Optical devices can be, for example, photographic devices, surveillance devices, webcams, car cameras or projection devices. If the environment in which the optical device is located is saturated with water vapor, it is easy to condense on the surface with a lower temperature, and condensation will occur near the lens. If dewdrops are formed on the light output path, it will not only affect the image quality, but also the dewdrops formed inside the device will be difficult to remove.

[0003] Therefore, it is necessary to design a novel optical device for preventing condensation to overcome the above-mentioned defects. Summary of the invention

[0004] The object of the present invention is to provide an optical device for preventing condensation, which can achieve the effect of preventing condensation by adjusting the airflow inlet and outlet paths to balance the water vapor with the outside.

[0005] To achieve the above-mentioned purpose, the present invention provides an optical device for preventing condensation, comprising: a shell having a first air permeable portion, which can be connected to the interior and exterior of the shell; a light-transmitting glass having an inner surface, which is combined with the shell with the inner surface facing the interior of the shell; and a lens structure, which is accommodated in the shell and forms a chamber between the shell and the inner surface of the light-transmitting glass; wherein an airflow inlet and outlet path can be formed between the chamber and the exterior of the shell, and the airflow inlet and outlet path is adjustable to control whether the airflow enters and exits the chamber and the exterior of the shell via the first air permeable portion.

[0006] Preferably, the lens structure has a second air permeable portion, which is connected to the chamber; when the first air permeable portion corresponds to the second air permeable portion and the first air permeable portion is connected to the inside and the outside of the shell, the airflow inlet and outlet path is adjusted to an open state, so that the airflow enters and exits the chamber and the outside of the shell through the first air permeable portion and the second air permeable portion.

[0007] Preferably, when the first air-permeable portion corresponds to the second air-permeable portion, the first air-permeable portion is aligned with the second air-permeable portion.

[0008] Preferably, the first ventilation portion and the second ventilation portion are openings on the housing and the lens structure respectively.

[0009] Preferably, it also includes a sealing member, which is arranged between the housing and the lens structure to provide a sealed connection; wherein the chamber is formed between the lens structure, the housing, the inner surface of the light-transmitting glass and the sealing member.

[0010] Preferably, when the first air permeable portion does not correspond to the second air permeable portion, the seal and / or the lens structure extend the airflow inlet and outlet path.

[0011] Preferably, the lens structure includes a movable ring, and the second air-permeable portion is disposed on the movable ring.

[0012] Preferably, the movable ring is a focus ring or a zoom ring.

[0013] Preferably, the lens structure further comprises a driving mechanism, wherein the driving mechanism is connected to the movable ring to drive the movable ring to rotate around the optical axis of the lens structure and / or move along the optical axis.

[0014] Preferably, it also includes a cover, which is movably disposed on the shell to selectively close or expose the first air permeable portion; when the cover closes the first air permeable portion, the airflow inlet and outlet path is adjusted to a closed state; when the cover exposes the first air permeable portion, the airflow inlet and outlet path is adjusted to an open state.

[0015] Preferably, it also includes a sealing member, which is disposed between the housing and the lens structure to provide a sealed connection; wherein the chamber is formed between the lens structure, the housing, the inner surface of the light-transmitting glass and the sealing member.

[0016] Preferably, it further comprises a sensor, which is disposed on the housing facing the light-transmitting glass; the lens structure comprises a movable ring and a driving mechanism, the driving mechanism is connected to the movable ring to drive the movable ring to move along the optical axis of the lens structure;

[0017] When the sensor detects condensation conditions, the driving mechanism drives the movable ring to move along the optical axis, so that a second air permeable portion is formed between the movable ring and the sealing member, and the second air permeable portion corresponds to the first air permeable portion, so that the airflow inlet and outlet path is adjusted to an open state, so that the airflow enters and exits the chamber and the outside of the shell through the second air permeable portion and the first air permeable portion.

[0018] Preferably, the second air permeable portion is a gap formed between the movable ring and the sealing member.

[0019] Preferably, when the sensor has not detected the condensation condition, the movable ring abuts against the sealing member and blocks the airflow inlet and outlet path.

[0020] Preferably, the sensor is a temperature sensor for detecting the temperature of the inner surface of the light-transmitting glass.

[0021] The present invention also provides an optical device for preventing condensation, comprising: a shell having a first air permeable portion, which can be connected to the interior and exterior of the shell; a cover movably disposed on the shell to selectively close or expose the first opening; a light-transmitting glass having an inner surface, the light-transmitting glass being combined with the shell with the inner surface facing the interior of the shell; and a lens structure accommodated in the shell and forming a chamber between the shell and the inner surface of the light-transmitting glass; wherein, when the cover exposes the first air permeable portion, an air flow inlet and outlet path in and out of the chamber and the outside of the shell is formed through the first air permeable portion.

[0022] Preferably, it also includes a sealing member, which is disposed between the housing and the lens structure to provide a sealed connection; wherein the chamber is formed between the lens structure, the housing, the inner surface of the light-transmitting glass and the sealing member.

[0023] The present invention also provides an optical device for preventing condensation, comprising: a shell having a first air permeable portion, the first air permeable portion being able to communicate with the interior and exterior of the shell; a light-transmitting glass having an inner surface, the light-transmitting glass being combined with the shell with the inner surface facing the interior of the shell; a sensor being arranged in the shell facing the light-transmitting glass; a lens structure accommodated in the shell, the lens structure comprising a movable ring and a driving mechanism, the driving mechanism being connected to the movable ring to drive the movable ring to move along the optical axis of the lens structure; and a sealing member being arranged between the shell and the lens structure to provide a sealed connection, a chamber being formed between the lens structure, the shell, the inner surface of the light-transmitting glass and the sealing member; wherein, when the sensor detects condensation conditions, the driving mechanism drives the movable ring to move along the optical axis, so that a gap is formed between the movable ring and the sealing member, the gap corresponding to the first air permeable portion, so as to form an air flow inlet and outlet path in and out of the chamber and the exterior of the shell via the gap and the first air permeable portion.

[0024] Preferably, when the sensor has not detected the condensation condition, the movable ring abuts against the sealing member and blocks the airflow inlet and outlet path.

[0025] Preferably, the sensor is a temperature sensor for detecting the temperature of the inner surface of the light-transmitting glass.

[0026] Compared with the prior art, an optical device for preventing condensation provided in an embodiment of the present invention includes a shell, a light-transmitting glass and a lens structure. The shell has a first air permeable portion, and the first air permeable portion can be connected to the inside and outside of the shell. The light-transmitting glass has an inner surface, and the light-transmitting glass is combined with the shell with the inner surface facing the inside of the shell. The lens structure is accommodated in the shell, and a chamber is formed between the shell and the inner surface of the light-transmitting glass. An airflow inlet and outlet path can be formed between the chamber and the outside of the shell, and the airflow inlet and outlet path is adjustable to control whether the airflow can enter and exit the chamber and the outside of the shell through the first air permeable portion. In this way, the water vapor can be balanced with the outside by adjusting the airflow inlet and outlet path to achieve the effect of preventing condensation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a side view of an optical device according to an embodiment of the present invention, showing that the airflow inlet and outlet paths are adjusted to a closed state.

[0028] Figure 2 yes Figure 1 A stereogram of the optical device.

[0029] Figure 3 yes Figure 1 A cross-sectional view of the optical device along the cut line 3-3'.

[0030] Figure 4 yes Figure 1 A side view of an optical device showing that the airflow inlet and outlet paths are adjusted to an open state.

[0031] Figure 5 yes Figure 4 A stereogram of the optical device.

[0032] Figure 6 yes Figure 4 A cross-sectional view of the optical device along the cut line 6-6'.

[0033] Figure 7 is a three-dimensional diagram of an optical device according to another embodiment of the present invention, showing that the airflow inlet and outlet paths are adjusted to a closed state.

[0034] Figure 8 yes Figure 7 A three-dimensional diagram of an optical device showing that the airflow inlet and outlet paths are adjusted to an open state.

[0035] Fig. 9 is a three-dimensional diagram of an optical device according to another embodiment of the present invention, showing that the airflow inlet and outlet paths are adjusted to a closed state.

[0036] Fig.10 yes Fig. 9 A cross-sectional view of the optical device along the cut line 10-10'.

[0037] Fig.11 yes Fig. 9 A three-dimensional diagram of an optical device showing that the airflow inlet and outlet paths are adjusted to an open state.

[0038] Fig.12 yes Fig.11 A cross-sectional view of the optical device along the cut line 12-12'.

[0039] Fig.13 is a cross-sectional view of an optical device according to yet another embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to provide a further understanding of the purpose, structure, features and functions of the present invention, a detailed description is given in conjunction with the embodiments.

[0041] The following will describe in detail various embodiments of the present invention, and will be illustrated with drawings. In addition to these detailed descriptions, the present invention can also be widely implemented in other embodiments, and any easy replacement, modification, and equivalent changes of the embodiments are included in the scope of the present invention, and are subject to the subsequent claims. In the description of the specification, in order to give the reader a more complete understanding of the present invention, many specific details and implementation examples are provided; however, these specific details and implementation examples should not be regarded as limitations of the present invention. In addition, well-known steps or elements are not described in detail to avoid unnecessary limitations of the present invention.

[0042] The present invention provides an optical device for preventing condensation, which can be applied to any device with an imaging lens, such as but not limited to a photographic device, a monitoring device, a network camera, a car camera or a projection device.

[0043] Figure 1 FIG. 1 is a side view of the optical device 100 according to an embodiment of the present invention, showing that the airflow inlet and outlet path AFP is adjusted to a closed state. Figure 2 yes Figure 1 A perspective view of an optical device 100 is shown. Figure 3 yes Figure 1 A cross-sectional view of the optical device 100 along the cut line 3-3'. Figure 4 yes Figure 1 FIG. 1 is a side view of the optical device 100 , showing that the airflow inlet and outlet path AFP is adjusted to an open state. Figure 5 yes Figure 4 A perspective view of an optical device 100 is shown. Figure 6 yes Figure 4 A cross-sectional view of the optical device 100 along the cut line 6-6'.

[0044] Please refer to Figures 1 to 6, the optical device 100 may include at least a shell 110, a light-transmitting glass 120 and a lens structure 130. The shell 110 has a light-transmitting opening 111. The lens structure 130 is accommodated in the shell 110, and the optical axis OA of the lens structure 130 may pass through the light-transmitting opening 111. In one embodiment, the optical axis OA of the lens structure 130 may be aligned with the light-transmitting opening 111, but this is not a limitation of the present invention. In other embodiments, the optical axis OA of the lens structure 130 and the light-transmitting opening 111 may not be aligned with each other. The light-transmitting glass 120 has an inner surface 121, and the light-transmitting glass 120 is combined with the shell 110 with the inner surface 121 facing the inside of the shell 110, and covers the light-transmitting opening 111.

[0045] A chamber C may be formed between the lens structure 130 and the inner surface 121 of the housing 110 and the light-transmitting glass 120. In one embodiment, the optical device 100 may further include a seal 140 disposed between the housing 110 and the lens structure 130 to provide a sealed connection. Here, a chamber C may be formed between the lens structure 130, the housing 110, the inner surface 121 of the light-transmitting glass 120, and the seal 140. The seal 140 may be, but is not limited to, rubber, silicone, or waterproof glue. In one embodiment, the seal 140 may be a continuous sealing ring structure that completely surrounds the connection between the lens structure 130 and the housing 110 to avoid a path that may enter and exit the chamber C between the seal 140 and the housing 110, or between the seal 140 and the lens structure 130. In one embodiment, the seal 140 is pressed tightly between the housing 110 and the lens structure 130 in an interference fit manner. The lens structure 130 can be pressed against the housing 110 in a direction parallel to the optical axis OA by the seal 140. When the lens structure 130 moves in a direction parallel to the optical axis OA, the seal 140 can be deformed in the direction parallel to the optical axis OA. In other embodiments, the optical device 100 may not include the seal 140. Figures 1 to 6 The sealing member 140 is shown for illustration only and is not a limitation of the present invention. For example, if the lens structure 130 does not move in a direction parallel to the optical axis OA, the sealing member 140 may be omitted.

[0046] also, Figure 2 and Figure 5The upper right part of the light-transmitting glass 120 is removed in the figure, thereby exposing the light-transmitting opening 111 of the housing 110. However, it should be understood that the modification of this part is only to show some structural details more clearly, and the light-transmitting glass 120 actually exists as a whole surface. Using the light-transmitting glass 120 as an appearance part can enhance the overall texture of the optical device 100. In addition, the light-transmitting glass 120 basically does not affect the imaging effect of the lens structure 130; however, if the water vapor inside the housing 110 reaches a saturated state, further, if the water vapor in the chamber C formed between the lens structure 130 and the housing 110 and the inner surface 121 of the light-transmitting glass 120 reaches a saturated state, dewdrops may be generated on the inner surface 121 of the light-transmitting glass 120, which will affect the imaging quality. The present invention forms an adjustable airflow inlet and outlet path AFP between the chamber C and the outside of the housing 110, so that the water vapor inside the chamber C is balanced with the water vapor outside the housing 110, thereby achieving the effect of preventing condensation.

[0047] In detail, the housing 110 may have a first air permeable portion H1, which can be connected to the inside and outside of the housing 110. In one embodiment, the first air permeable portion H1 may be an opening that penetrates the housing 110, and the air inside the housing 110 can circulate with the outside air through the opening. The lens structure 130 may have a second air permeable portion H2, which is connected to the chamber C. In one embodiment, the second air permeable portion H2 may be an opening on the lens structure 130. In a specific embodiment, the lens structure 130 may include a movable ring 131 and a driving mechanism 132. The movable ring 131 is, for example, a focus ring or a zoom ring. The driving mechanism 132 is connected to the movable ring 131 to drive the movable ring 131 to rotate around the optical axis OA of the lens structure 130, or to drive the movable ring 131 to move along the optical axis OA, or to drive the movable ring 131 to rotate around the optical axis OA and move along the optical axis OA at the same time. The second air permeable portion H2 may be disposed on the movable ring 131 . The second air permeable portion H2 may be an opening penetrating the movable ring 131 . The air inside the chamber C may flow through the opening to the air outside the movable ring 131 .

[0048] like Figures 1 to 3 As shown in the optical device 100, the first air permeable portion H1 does not correspond to the second air permeable portion H2, that is, the first air permeable portion H1 and the second air permeable portion H2 are offset from each other, and the air inside the chamber C does not directly circulate with the air outside the housing 110. Once the water vapor inside the chamber C reaches a saturated state and dewdrops are formed on the inner surface of the light-transmitting glass 120, the user can press a button to control the driving mechanism 132 to drive the movable ring 131 to move. Figures 4 to 6As shown in the figure, the movable ring 131 can be driven by the driving mechanism 132 to rotate and move forward toward the light-transmitting glass 120, so that the first air permeable portion H1 corresponds to the second air permeable portion H2. At this time, an open air flow inlet and outlet path AFP is formed between the chamber C and the outside of the housing 110. Here, the first air permeable portion H1 and the second air permeable portion H2 can be completely corresponding, for example Figures 4 to 6 As shown, the first air permeable portion H1 and the second air permeable portion H2 have corresponding shapes or sizes, so that the first air permeable portion H1 is aligned with the second air permeable portion H2; in other embodiments not shown, the first air permeable portion H1 and the second air permeable portion H2 may be partially corresponding, for example, the first air permeable portion H1 and the second air permeable portion H2 do not have corresponding shapes or sizes, or the first air permeable portion H1 is not completely aligned with the second air permeable portion H2, etc. When the airflow inlet and outlet path AFP is adjusted to an open state, the airflow can enter and exit the chamber C and the outside of the housing 110 through the first air permeable portion H1 and the second air permeable portion H2 to prevent the moisture inside the chamber C from condensing on the inner surface 121 of the light-transmitting glass 120.

[0049] Figures 1 to 3 The airflow inlet and outlet paths formed by AFP and Figures 4 to 6 The airflow in and out path of AFP is more extended. Figures 1 to 3 In the case of, since the seal 140 and / or the lens structure 130 (such as the movable ring 131) blocks the first air permeable portion H1, the air inside the chamber C can only circulate with the inside of the housing 110 through the second air permeable portion H2 which is offset from the first air permeable portion H1. In addition, the air reaching the inside of the housing 110 needs to further flow to the first air permeable portion H1 before it can circulate with the air outside the housing 110. Therefore, Figures 1 to 3 The formed relatively long air inlet and outlet path AFP greatly reduces the air flow efficiency between the chamber C and the outside of the housing 110. Once moisture accumulates in the chamber C, it cannot effectively circulate with the air outside the housing 110. By rotating or moving the movable ring 131 to make the second air permeable portion H2 correspond to the first air permeable portion H1, an air flow inlet and outlet path AFP that can directly enter and exit the chamber C and the outside of the housing 110 can be formed, thereby improving the air flow efficiency and avoiding condensation.

[0050] Figure 7 is a three-dimensional diagram of an optical device 200 according to another embodiment of the present invention, showing that the airflow inlet and outlet paths are adjusted to a closed state. Figure 8 yes Figure 7 3D view of the optical device 200, showing that the airflow inlet and outlet paths are adjusted to an open state.

[0051] Please refer to Figure 7 and Figure 8, the optical device 200 may include at least a shell 210, a light-transmitting glass 220, a lens structure 230 and a sensor 250. The shell 210 has a light-transmitting opening 211 and a through-hole 212. The lens structure 230 is accommodated in the shell 210, and the optical axis OA of the lens structure 230 may pass through the light-transmitting opening 211. Among them, the optical axis OA may be aligned or not aligned with the light-transmitting opening 211. In a specific embodiment, the lens structure 230 may include a movable ring 231 and a driving mechanism 232. The movable ring 231 is, for example, a focus ring or a zoom ring. The driving mechanism 232 is connected to the movable ring 231 to drive the movable ring 231 to move along the optical axis OA, or to drive the movable ring 231 to rotate around the optical axis OA and move along the optical axis OA at the same time. Similar to Figures 1 to 6 In the optical device 100, the light-transmitting glass 220 has an inner surface (not shown). The light-transmitting glass 220 is combined with the housing 210 with the inner surface facing the inside of the housing 210, and covers the light-transmitting opening 211 and the through hole 212. The sensor 250 is disposed on the housing 210 facing the light-transmitting glass 220. In one embodiment, the sensor 250 is, for example, a temperature sensor, which can detect the temperature of the inner surface of the light-transmitting glass 220 through the through hole 212.

[0052] A chamber C may be formed between the lens structure 230, the housing 220, and the inner surface of the light-transmitting glass 220. In one embodiment, the optical device 200 may further include a sealing member 240 disposed between the housing 210 and the lens structure 230 to provide a sealed connection. Here, a chamber C may be formed between the lens structure 230, the housing 220, the inner surface of the light-transmitting glass 220, and the sealing member 240. The sealing member 240 is similar to Figures 1 to 6 The sealing member 140 is not described in detail here. When the movable ring 231 of the lens structure 230 moves along the optical axis OA, the sealing member 240 may be deformed in a direction parallel to the optical axis OA.

[0053] also, Figure 7 and Figure 8 The upper right part of the light-transmitting glass 220 is removed, thereby exposing the light-transmitting opening 211 of the housing 210. However, it should be understood that the modification of this part is only to show some structural details more clearly, and the light-transmitting glass 220 actually exists as a whole surface.

[0054] In this embodiment, an adjustable airflow path (not shown) may be formed between the chamber C and the outside of the housing 210 to balance the moisture inside the chamber C with the moisture outside the housing 210, thereby achieving the effect of preventing condensation. Figure 7 and Figure 8 As shown, the housing 210 may have a first ventilating portion H1 (shown in FIG. Figure 8), the first air permeable portion H1 can be connected to the inside and outside of the shell 210. In one embodiment, the first air permeable portion H1 can be an opening that penetrates the shell 210, and the air inside the shell 210 can circulate with the outside air through the opening. When the sensor 250 detects condensation conditions, for example, when the temperature is lower than 5°C, the processor will send a signal to drive the driving mechanism 232 to drive the movable ring 231 to move along the optical axis OA, so that the movable ring 231 retreats, so that a second air permeable portion H2 is formed between the movable ring 231 and the sealing member 240, and the second air permeable portion H2 corresponds to the first air permeable portion H1, and the airflow inlet and outlet path is adjusted to an open state. In a specific embodiment, if Figure 8 As shown, the second air permeable portion H2 can be a gap formed between the movable ring 231 and the sealing member 240. When the gap corresponds to the first air permeable portion H1, the airflow inlet and outlet path is adjusted to an open state. At this time, the airflow can enter and exit the chamber C and the outside of the housing 210 through the second air permeable portion H2 and the first air permeable portion H1 to prevent the water vapor inside the chamber C from condensing on the inner surface of the light-transmitting glass 220. When the condensation condition is not met, the processor can make the driving mechanism 232 drive the movable ring 231 to move forward and abut against the sealing member 240 to shield the airflow inlet and outlet path, so that the airflow inlet and outlet path is adjusted to a closed state.

[0055] Fig. 9 It is a three-dimensional diagram of an optical device 300 according to another embodiment of the present invention, showing that the airflow inlet and outlet path AFP is adjusted to a closed state. Fig.10 yes Fig. 9 A cross-sectional view of the optical device 300 along the cut line 10-10'. Fig.11 yes Fig. 9 3D view of the optical device 300, showing that the airflow inlet and outlet path AFP is adjusted to an open state. Fig.12 yes Fig.11 A cross-sectional view of the optical device 300 along the cut plane line 12-12'.

[0056] Please refer to Figures 9 to 12 , the optical device 300 may include at least a housing 310, a light-transmitting glass 320, a lens structure 330 and a cover 360. The housing 310 has a light-transmitting opening 311. The lens structure 330 is accommodated in the housing 310, and the optical axis OA of the lens structure 330 may pass through the light-transmitting opening 311. The optical axis OA may be aligned with or not aligned with the light-transmitting opening 311. Similar to Figures 1 to 6 In the optical device 100 , the light-transmitting glass 320 has an inner surface 321 . The light-transmitting glass 320 is combined with the housing 310 with the inner surface facing the inside of the housing 310 , and covers the light-transmitting opening 311 .

[0057] A chamber C may be formed between the lens structure 330, the housing 320, and the inner surface 321 of the light-transmitting glass 320. In one embodiment, the optical device 300 may further include a sealing member 340 disposed between the housing 310 and the lens structure 330 to provide a sealed connection. Here, a chamber C may be formed between the lens structure 330, the housing 320, the inner surface 321 of the light-transmitting glass 320, and the sealing member 340. The sealing member 340 is similar to Figures 1 to 6 The seal 140 described above will not be described in detail here. When the lens structure 330 moves in a direction parallel to the optical axis OA, the seal 340 may be deformed in the direction parallel to the optical axis OA. In other embodiments, the optical device 300 may not include the seal 340. Figures 9 to 12 The seal 340 is shown for illustration only and is not a limitation of the present invention. For example, if the lens structure 330 does not move in a direction parallel to the optical axis OA, the seal 340 may be omitted.

[0058] also, Fig. 9 and Fig.11 The upper right part of the light-transmitting glass 320 is removed, thereby exposing the light-transmitting opening 311 of the housing 310. However, it should be understood that the modification of this part is only to show some structural details more clearly, and the light-transmitting glass 320 actually exists as a whole surface.

[0059] In this embodiment, an adjustable airflow path (not shown) may be formed between the chamber C and the outside of the housing 310 to balance the moisture inside the chamber C with the moisture outside the housing 310, thereby achieving the effect of preventing condensation. Fig.10 , Fig.11 and Fig.12 As shown, the housing 310 may have a first air permeable portion H1, which can be connected to the inside and outside of the housing 310. In one embodiment, the first air permeable portion H1 may be an opening that penetrates the housing 310, and the air inside the housing 310 can circulate with the outside air through the opening. The lens structure 330 may have a second air permeable portion H2, which is connected to the chamber C. In one embodiment, the second air permeable portion H2 may be an opening on the lens structure 330. In a specific embodiment, the lens structure 330 may include a movable ring 331 and a driving mechanism 332. The movable ring 331 is, for example, a focus ring or a zoom ring. The driving mechanism 332 is connected to the movable ring 331 to drive the movable ring 331 to rotate around the optical axis OA of the lens structure 330, or to drive the movable ring 331 to move along the optical axis OA, or to drive the movable ring 331 to rotate around the optical axis OA and move along the optical axis OA at the same time. The second air permeable portion H2 may be disposed on the movable ring 331 , and the second air permeable portion H2 may be an opening penetrating the movable ring 331 .

[0060] exist Figure 9-10as well as Figure 11-12 In the state of the second air permeable portion H2, the second air permeable portion H2 corresponds to the first air permeable portion H1. Here, the optical device 300 can close or open the air inlet and outlet path AFP by setting the cover 360. The cover 360 can be movably set on the housing 310 to selectively close or expose the first air permeable portion H1. When the cover 360 covers the first air permeable portion H1, the air inlet and outlet path AFP is adjusted to the closed state, such as Figure 9-10 As shown. When the cover 360 exposes the first air permeable portion H1, the airflow inlet and outlet path AFP is adjusted to an open state. At this time, the airflow can enter and exit the chamber C and the outside of the housing 310 through the second air permeable portion H2 and the first air permeable portion H1 to prevent the water vapor inside the chamber C from condensing on the inner surface 321 of the light-transmitting glass 320. In other words, when the user finds that condensation occurs on the inner surface 321 of the light-transmitting glass 320, the user can expose the first air permeable portion H1 by opening the cover 360, thereby improving the condensation phenomenon.

[0061] In one embodiment, the cover 360 can also be applied to Figures 1 to 6 If the movable ring 331 is similar to Figures 1 to 6 The movable ring 131 described in the embodiment, for example, the movable ring 331 can be driven by the driving mechanism 332 to rotate and move forward toward the direction of the light-transmitting glass 320 or backward away from the direction of the light-transmitting glass 320, so that the second air permeable portion H2 and the first air permeable portion H1 correspond to each other or do not correspond to each other. The user can still adjust the state of the airflow inlet and outlet path AFP by opening or closing the cover 360. For example, if the second air permeable portion H2 corresponds to the first air permeable portion H1, and the user observes that there is no condensation on the inner surface 321 of the light-transmitting glass 320, the cover 360 can be closed; or, if the cover 360 is opened, but the second air permeable portion H2 does not correspond to the first air permeable portion H1, and the user observes that condensation slowly begins to form on the inner surface 321 of the light-transmitting glass 320, the user can press a button to control the driving mechanism 332 to drive the movable ring 331 to move, so that the second air permeable portion H2 corresponds to the first air permeable portion H1, thereby improving the air flow efficiency between the chamber C and the outside of the shell 310.

[0062] In one embodiment, the cover 360 can also be applied to Figures 7 and 8 For example, if the movable ring 231 and the sealing member 240 form a second air permeable portion H2 (such as a gap) corresponding to the first air permeable portion H1, and the user observes that there is no condensation on the inner surface of the light-transmitting glass 220, the cover 360 can be closed to directly adjust the airflow inlet and outlet path to a closed state.

[0063] Fig.13 is a cross-sectional view of an optical device 400 according to yet another embodiment of the present invention. Fig.13 , the optical device 400 may include at least a housing 410, a light-transmitting glass 420, a lens structure 430 and a cover 460. The housing 410 has a light-transmitting opening 411. The lens structure 430 is accommodated in the housing 410, and the optical axis OA of the lens structure 430 may pass through the light-transmitting opening 411. The optical axis OA may be aligned with or not aligned with the light-transmitting opening 411. Similar to Figures 1 to 6 In the optical device 100 , the light-transmitting glass 420 has an inner surface 421 . The light-transmitting glass 420 is combined with the housing 410 with the inner surface facing the inside of the housing 410 , and covers the light-transmitting opening 411 .

[0064] A chamber C may be formed between the lens structure 430, the housing 420, and the inner surface 421 of the light-transmitting glass 420. In one embodiment, the optical device 400 may further include a sealing member 440 disposed between the housing 410 and the lens structure 430 to provide a sealed connection. Here, a chamber C may be formed between the lens structure 430, the housing 420, the inner surface 421 of the light-transmitting glass 420, and the sealing member 440. The sealing member 440 is similar to Figures 1 to 6 The seal 140 described above will not be described in detail here. When the lens structure 430 moves in a direction parallel to the optical axis OA, the seal 440 may be deformed in the direction parallel to the optical axis OA. In other embodiments, the optical device 400 may not include the seal 440. Fig.13 The seal 440 is shown for illustration only and is not a limitation of the present invention. For example, if the lens structure 430 does not move in a direction parallel to the optical axis OA, the seal 440 may be omitted.

[0065] In this embodiment, an adjustable airflow path AFP can also be formed between the chamber C and the outside of the housing 410 to balance the moisture inside the chamber C with the moisture outside the housing 410, thereby achieving the effect of preventing condensation. Fig.13 As shown, the housing 410 may have a first ventilating portion H1, which can communicate the inside and outside of the housing 410. In one embodiment, the first ventilating portion H1 may be an opening penetrating the housing 410, and the air inside the housing 410 may circulate with the outside air through the opening.

[0066] Here, the optical device 400 can close or open the airflow path AFP by disposing the cover 360. The cover 460 can be movably disposed on the housing 410 to selectively close or expose the first air permeable portion H1. When the cover 460 covers the first air permeable portion H1 (e.g. Fig.13 The air inlet and outlet path AFP is adjusted to a closed state. When the cover 460 exposes the first air permeable portion H1 (as shown in FIG. Fig.13The airflow path AFP is adjusted to an open state by opening the cover 460 (shown by a dotted line in the figure). At this time, the airflow can enter and exit the chamber C and the outside of the housing 410 through the first air permeable portion H1 to prevent the moisture inside the chamber C from condensing on the inner surface 421 of the light-transmitting glass 420. In other words, when the user finds that condensation occurs on the inner surface 421 of the light-transmitting glass 420, the user can expose the first air permeable portion H1 by opening the cover 460, thereby improving the condensation phenomenon.

[0067] In summary, an optical device for preventing condensation provided by an embodiment of the present invention includes a shell, a light-transmitting glass and a lens structure. The shell has a first air permeable portion, and the first air permeable portion can be connected to the inside and outside of the shell. The light-transmitting glass has an inner surface, and the light-transmitting glass is combined with the shell with the inner surface facing the inside of the shell. The lens structure is accommodated in the shell, and a chamber is formed between the shell and the inner surface of the light-transmitting glass. An airflow inlet and outlet path can be formed between the chamber and the outside of the shell, and the airflow inlet and outlet path is adjustable to control whether the airflow can enter and exit the chamber and the outside of the shell through the first air permeable portion. In this way, the water vapor can be balanced with the outside by adjusting the airflow inlet and outlet path to achieve the effect of preventing condensation.

[0068] Although the present invention is described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify the preferred embodiments of the present invention and should not be construed as limiting the present invention. In order to clearly describe the required components, the proportions in the schematic drawings do not represent the proportional relationship of the actual components.

[0069] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. An optical device for preventing condensation, characterized in that: include: The housing has a first ventilating portion, and the first ventilating portion can communicate with the inside and outside of the housing; A light-transmitting glass having an inner surface, wherein the light-transmitting glass is combined with the housing with the inner surface facing the interior of the housing; as well as A lens structure is accommodated in the housing and forms a chamber between the housing and the inner surface of the light-transmitting glass; An airflow inlet and outlet path can be formed between the chamber and the outside of the shell, and the airflow inlet and outlet path is adjustable to control whether the airflow enters and exits the chamber and the outside of the shell through the first air permeable portion.

2. The optical device for preventing condensation according to claim 1, wherein: The lens structure has a second air permeable portion, which is connected to the chamber; when the first air permeable portion corresponds to the second air permeable portion and the first air permeable portion is connected to the inside and the outside of the shell, the airflow inlet and outlet path is adjusted to an open state, so that the airflow enters and exits the chamber and the outside of the shell through the first air permeable portion and the second air permeable portion.

3. The optical device for preventing condensation according to claim 2, wherein: When the first air-permeable portion corresponds to the second air-permeable portion, the first air-permeable portion is aligned with the second air-permeable portion.

4. The optical device for preventing condensation according to claim 3, wherein: The first ventilation portion and the second ventilation portion are openings on the housing and the lens structure respectively.

5. The optical device for preventing condensation according to claim 2, wherein: It also includes a sealing member, which is arranged between the housing and the lens structure to provide a sealed connection; wherein the chamber is formed between the lens structure, the housing, the inner surface of the light-transmitting glass and the sealing member.

6. The optical device for preventing condensation according to claim 5, wherein: When the first air permeable portion does not correspond to the second air permeable portion, the seal and / or the lens structure extend the airflow inlet and outlet path.

7. The optical device for preventing condensation according to claim 2, wherein: The lens structure comprises a movable ring, and the second air permeable portion is arranged on the movable ring.

8. The optical device for preventing condensation according to claim 7, wherein: The movable ring is a focus ring or a zoom ring.

9. The optical device for preventing condensation according to claim 7, wherein: The lens structure further comprises a driving mechanism, which is connected to the movable ring to drive the movable ring to rotate around the optical axis of the lens structure and / or move along the optical axis.

10. The optical device for preventing condensation according to any one of claims 1 to 9, wherein: It also includes a cover, which is movably disposed on the shell to selectively close or expose the first air permeable portion; when the cover closes the first air permeable portion, the airflow inlet and outlet path is adjusted to a closed state; when the cover exposes the first air permeable portion, the airflow inlet and outlet path is adjusted to an open state.

11. The optical device for preventing condensation according to claim 1, wherein: It also includes a sealing member, which is arranged between the shell and the lens structure to provide a sealed connection; wherein the chamber is formed between the lens structure, the shell, the inner surface of the light-transmitting glass and the sealing member.

12. The optical device for preventing condensation according to claim 11, wherein: It also includes a sensor, which is disposed on the housing facing the light-transmitting glass; the lens structure includes a movable ring and a driving mechanism, and the driving mechanism is connected to the movable ring to drive the movable ring to move along the optical axis of the lens structure; When the sensor detects condensation conditions, the driving mechanism drives the movable ring to move along the optical axis, so that a second air permeable portion is formed between the movable ring and the sealing member, and the second air permeable portion corresponds to the first air permeable portion, so that the airflow inlet and outlet path is adjusted to an open state, so that the airflow enters and exits the chamber and the outside of the shell through the second air permeable portion and the first air permeable portion.

13. The optical device for preventing condensation according to claim 12, wherein: The second air permeable portion is a gap formed between the movable ring and the sealing member.

14. The optical device for preventing condensation according to claim 12, wherein: When the sensor has not detected the condensation condition, the movable ring abuts against the sealing component and shields the airflow inlet and outlet path.

15. The optical device for preventing condensation according to claim 12, wherein: The sensor is a temperature sensor, which is used to detect the temperature of the inner surface of the light-transmitting glass.

16. An optical device for preventing condensation, characterized in that: include: The housing has a first ventilating portion, and the first ventilating portion can communicate with the inside and outside of the housing; A cover member movably disposed on the housing to selectively close or expose the first opening; A light-transmitting glass having an inner surface, wherein the light-transmitting glass is combined with the housing with the inner surface facing the interior of the housing; as well as A lens structure is accommodated in the housing and forms a chamber between the housing and the inner surface of the light-transmitting glass; When the cover exposes the first air permeable portion, an air flow inlet and outlet path is formed through the first air permeable portion to enter and exit the chamber and the outside of the shell.

17. The optical device for preventing condensation according to claim 16, wherein: It also includes a sealing member, which is arranged between the shell and the lens structure to provide a sealed connection; wherein the chamber is formed between the lens structure, the shell, the inner surface of the light-transmitting glass and the sealing member.

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