High-speed shooting remote lens with eye position observation sheet

Abstract

A high-speed remote lens with an eye position observation sheet comprises a support unit, a lens base unit and the eye position observation sheet. The support unit comprises a supporting arm. The lens base unit is arranged on the supporting arm and comprises an eyepiece lens base and an objective lens base. The eyepiece lens base is provided with a first base body and a reflecting lens. The objective lens base is provided with a second base body and a magnifying lens. And the magnifying lens is positioned above the reflecting lens in the vertical direction. And the eye position observation sheet is arranged on one side of the lens base unit and is opposite to the reflecting lens at an interval. And the eye position observation sheet is provided with a view window which is smaller than the reflecting lens in area and can be used for viewing the reflecting lens. According to the utility model, a user can quickly obtain a good viewing range through the viewing window.

Description

Technical Field

[0001] The utility model relates to an optical device, in particular to a high-power telescopic camera with an eye position observation piece. Background Art

[0002] In order to solve the problem of eye fatigue caused by reading books or using tablets at too close a distance, a high-power telescopic camera created by the applicant of this case and obtaining the Taiwan, China utility model patent number M656366 uses optical magnification technology to extend the viewing distance, which can not only relieve eye pressure but also reduce the burden on the cervical vertebra.

[0003] In order to facilitate the user to quickly obtain a good viewing range when viewing a book or a tablet through the high-power telescopic camera and avoid the interference of the line of sight by other objects, the applicant of this case, with the attitude of striving for perfection, deeply studied and improved the creation, and then completed this creation. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a high-power telescopic camera with an eye position observation piece that can quickly obtain a good viewing range.

[0005] The high-power telescopic camera with an eye position observation piece of the utility model includes a bracket unit, a lens base unit and an eye position observation piece.

[0006] The bracket unit includes a support arm. The lens base unit is arranged on the support arm and includes an eyepiece lens base and an objective lens base. The eyepiece lens base has a first base body and a reflecting lens mounted on the first base body. The objective lens base has a second base body and a magnifying lens mounted on the second base body. The magnifying lens is located above the reflecting lens in the up-down direction.

[0007] The eye position observation piece is arranged on one side of the lens base unit and is spaced opposite to the reflecting lens. The eye position observation piece has a viewing window with an area smaller than that of the reflecting lens and can view the reflecting lens.

[0008] For the high-power telescopic camera with an eye position observation piece of the utility model, the viewing window is a rectangle with a width greater than the height in the left-right direction.

[0009] For the high-power telescopic camera with an eye position observation piece of the utility model, the objective lens base is rotatably shafted on the eyepiece lens base, the eye position observation piece is arranged on the side of the second base body away from the support arm, and the lens base unit can be switched between a closed state and an open state. In the closed state, the objective lens base covers the eyepiece lens base. In the open state, the objective lens base is opened relative to the eyepiece lens base, and the eye position observation piece is spaced opposite to the reflecting lens.

[0010] The high - magnification telescopic camera with an eye - position observation piece of the present utility model, wherein the eye - position observation piece includes a fixed piece body arranged on the second seat body, and a viewing window piece body connected to the fixed piece body. The viewing window piece body extends obliquely downward and away from the eyepiece base from the second seat body.

[0011] The high - magnification telescopic camera with an eye - position observation piece of the present utility model, wherein the eye - position observation piece further includes an installation group. The installation group has a first engaging piece arranged on the second seat body, and a second engaging piece arranged on the fixed piece body and used for engaging the first engaging piece.

[0012] The high - magnification telescopic camera with an eye - position observation piece of the present utility model, wherein the first engaging piece is a magnetizable metal piece, and the second engaging piece is a magnet.

[0013] The high - magnification telescopic camera with an eye - position observation piece of the present utility model, wherein the fixed piece body has a fixed piece portion, and an inclined piece portion extending obliquely downward from the fixed piece portion. The fixed piece portion has a plurality of recesses arranged at intervals, and the second engaging piece has a plurality of magnets respectively fixed in the recesses.

[0014] The high - magnification telescopic camera with an eye - position observation piece of the present utility model, wherein the inclined piece portion of the fixed piece body has an avoidance notch, and the viewing window is formed on the viewing window piece body and is generally aligned with the avoidance notch.

[0015] The high - magnification telescopic camera with an eye - position observation piece of the present utility model, wherein the first engaging piece is one of a convex part and a concave part, and the second engaging piece is the other of the convex part and the concave part.

[0016] The high - magnification telescopic camera with an eye - position observation piece of the present utility model, wherein the bracket unit further includes a base, the support arm extends obliquely upward from the base, and the eyepiece base is slidably arranged on the support arm.

[0017] The high - magnification telescopic camera with an eye - position observation piece of the present utility model, wherein the lens base unit further includes at least one support group. The at least one support group has a support rod, and when the lens base unit is in the open state, the support rod supports between the first seat body and the second seat body.

[0018] The high - magnification telescopic camera with an eye - position observation piece of the present utility model, when the lens base unit is in the open state, the eye - position observation piece and the magnifying lens are clamped at an angle of 90 degrees to 140 degrees.

[0019] The high - magnification telescopic camera with an eye - position observation piece of the present utility model is suitable for being electrically connected to an electronic screen device and used for magnifying the picture of the electronic screen device on the reflection lens. The lens base unit further includes a transmission line for electrically connecting the electronic screen device.

[0020] The high-power telescopic camera with an eye position observation lens of the present utility model, wherein the lens base unit is in a rectangular shape and has a front opening for setting the eye position observation lens.

[0021] The high-power telescopic camera with an eye position observation lens of the present utility model, wherein the second base is made of a cloth with stiffness, and the second base can be folded and stored in the eyepiece lens base.

[0022] The high-power telescopic camera with an eye position observation lens of the present utility model, wherein the magnifying lens is in a horizontal state.

[0023] The high-power telescopic camera with an eye position observation lens of the present utility model, wherein the bracket unit further includes a base, the support arm extends upward from the base, and the base is a tripod.

[0024] The high-power telescopic camera with an eye position observation lens of the present utility model, wherein the bracket unit further includes a base, the support arm extends upward from the base, and both the base and the support arm are in a rectangular shape.

[0025] The beneficial effect of the present utility model is that: through the viewing window of the eye position observation lens, the user can quickly obtain a good viewing range, enabling the user to quickly locate at a good eye position height and viewing position, avoiding interference of the line of sight by other objects, and having high practicability. Description of the Drawings

[0026] Other features and effects of the present utility model will be clearly presented in the embodiments with reference to the drawings, wherein:

[0027] Figure 1 is a perspective view showing a lens base unit of the first embodiment of the high-power telescopic camera with an eye position observation lens of the present utility model in an open state;

[0028] Figure 2 is a perspective view showing the lens base unit in a closed state;

[0029] Figure 3 is a side view of the first embodiment, and the lens base unit is in the open state;

[0030] Figure 4 is a front view of the first embodiment, and the lens base unit is in the open state;

[0031] Figure 5 is a usage schematic diagram showing the lens base unit moving in a vertical direction relative to a support arm of the first embodiment;

[0032] Figure 6 is an exploded perspective view of the first embodiment;

[0033] Figure 7 is an incomplete three-dimensional exploded view of an eye position observation piece of the first embodiment;

[0034] Figure 8 is a schematic diagram for explaining that the eye position observation piece can be replaced;

[0035] Figure 9 is a schematic diagram for explaining the optical imaging path of the present invention;

[0036] Figure 10 is an incomplete three-dimensional exploded view for explaining another aspect of the eye position observation piece of the second embodiment of the present invention;

[0037] Figure 11 is a three-dimensional view for explaining that the third embodiment of the present invention is electrically connected to an electronic screen device, and the lens base unit is in the open state;

[0038] Figure 12 is a three-dimensional view, and the lens base unit is in the closed state;

[0039] Figure 13 is similar to Figure 11 a three-dimensional view for explaining a variant aspect of the third embodiment;

[0040] Figure 14 is similar to Figure 11 a three-dimensional view for explaining another variant aspect of the third embodiment. Detailed implementation manners

[0041] Refer to Figures 1 to 3 , the first embodiment of the high-power telescopic camera with an eye position observation piece of the present invention is suitable for being placed on a table (not shown in the figure) for use. The high-power telescopic camera with an eye position observation piece includes a bracket unit 1, a lens base unit 2, and an eye position observation piece 3.

[0042] The bracket unit 1 includes a base 11 extending along a front-rear direction Y and being in a thin plate shape, a support arm 12 extending upward and forward obliquely from the base 11 along an up-down direction Z, and a reinforcing rod 13 extending upward from the base 11 to the support arm 12. In this embodiment, the bracket unit 1 is a tabletop bracket, and the base 11 and the support arm 12 are integrally formed sheet metal parts. In other variants, the bracket unit 1 can also be a cantilever bracket with the base 11 omitted, or a floor-standing bracket placed on the ground. The base 11 and the support arm 12 can be separate independent components, which is not limited thereto. The reinforcing rod 13 is located in front of the support arm 12 and can assist the support arm 12 to jointly support the lens base unit 2, but in some specific examples, the reinforcing rod 13 can be omitted.

[0043] The lens base unit 2 is disposed on the support arm 12 and includes an eyepiece lens base 21 slidably disposed on the support arm 12, an objective lens base 22 rotatably shafted on the eyepiece lens base 21, at least one support group 23 for supporting the eyepiece lens base 21 and the objective lens base 22, and a light source 24 provided on the bottom side of the eyepiece lens base 21 and capable of providing light. The eyepiece lens base 21 is generally inclined up and down and has a first base body 211 capable of sliding up and down relative to the support arm 12, a reflecting lens 212 mounted on the first base body 211, and a knob 213 rotatably disposed between the support arm 12 and the first base body 211. The objective lens base 22 has a second base body 221 rotatably shafted on the first base body 211 and a magnifying lens 222 mounted on the second base body 221. The rear side of the second base body 221 is shafted on the first base body 211.

[0044] The lens base unit 2 can be switched between a closed state (see Figure 2 ) and an open state (see Figure 1 ). As shown in Figure 2 , in the closed state, the objective lens base 22 covers the eyepiece lens base 21. As shown in Figure 1 and Figure 3 , in the open state, the objective lens base 22 is opened relative to the eyepiece lens base 21, and the magnifying lens 222 is located above the reflecting lens 212 in the up and down direction Z, and the magnifying lens 222 is generally horizontal.

[0045] Referring to Figure 3 and Figure 4 , in this embodiment, the lens base unit 2 includes two support groups 23 respectively mounted on two opposite sides of the lens base unit 2. The support groups 23 are spaced apart in a left and right direction X. Each support group 23 has two magnetic members 231 and a support rod 232. The magnetic members 231 of each support group 23 are magnets and are respectively magnetically attracted to the first base body 211 and the second base body 221. When the lens base unit 2 is in the open state, two opposite ends of the support rod 232 of each support group 23 are respectively magnetically attracted to the magnetic members 231, so that the support rod 232 of each support group 23 can be supported between the first base body 211 and the second base body 221, thereby having the function of stabilizing the overall center of gravity and preventing shaking.

[0046] In some variations, each of the support groups 23 can be pivotally mounted on the first base body 211 and the second base body 221 by two mutually articulated rod bodies, which can also achieve the effect of stabilizing the overall center of gravity and preventing shaking. Alternatively, the support group 23 can be omitted. As long as the weight of the base 11 is increased, or the shape or form of the bracket unit 1 is changed, the effect of stabilizing the center of gravity can be achieved.

[0047] Refer to Figure 5 , in this embodiment, by rotating the knob 213 and then pulling the eyepiece holder 21 up and down, the height of the holder unit 2 in the up and down direction Z can be adjusted to suit users of different heights. In some specific examples, the knob 213 can also be omitted and the holder unit 2 can be made fixed.

[0048] Refer to Figure 3 , Figure 6 and Figure 7 , the eye position observation piece 3 is arranged on the side of the second base body 221 away from the support arm 12 in the front and back direction Y, that is, the eye position observation piece 3 is arranged on the front side of the second base body 221. When the holder unit 2 is in the open state, the eye position observation piece 3 is spaced opposite to the reflecting lens 212, and the eye position observation piece 3 and the magnifying lens 222 are approximately 130 degrees apart. The eye position observation piece 3 has a viewing window 30 with an area smaller than that of the reflecting lens 212 and can view the reflecting lens 212.

[0049] In some specific examples, the eye position observation piece 3 includes a fixed piece body 31 disposed on the second seat body 221, a window piece body 32 connected to the fixed piece body 31 and in a rectangular shape, and an installation group 33. In some specific examples, the fixed piece body 31 is made by plastic injection molding, but not limited thereto. The fixed piece body 31 has a fixed piece portion 311 and an inclined piece portion 312 extending obliquely downward from the fixed piece portion 311. The fixed piece portion 311 has a plurality of recesses 313 disposed at intervals. The inclined piece portion 312 has an avoidance notch 314 generally in an inverted U shape. In some specific examples, the window piece body 32 is cut from a black plastic sheet, but not limited thereto. The window piece body 32 extends obliquely downward from the second seat body 221 and away from the eyepiece base 21. The viewing window 30 is in a rectangular shape and formed on the window piece body 32, and generally aligned with the avoidance notch 314. In some embodiments, the eye position observation piece 3 is in a trapezoidal shape with a wider upper part and a narrower lower part, but in other variations, the eye position observation piece 3 can be a square, a rectangle, an ellipse or other geometric shapes. In some embodiments, the viewing window 30 of the eye position observation piece 3 is a rectangle (i.e., a horizontal rectangle) with a width in the left-right direction X greater than a height in the up-down direction Z, but in other variations, the viewing window 30 can also be an ellipse or other horizontal geometric shapes. In some embodiments, the height distance from the center of the viewing window 30 of the eye position observation piece 3 to the desktop is not greater than 60 cm. Specifically, a height distance between 40 and 60 cm can meet the height requirements of various people.

[0050] The installation group 33 of the present embodiment has a first engaging member 331 installed on the second seat body 221 and a second engaging member 332 disposed on the fixed piece body 31 and used to engage the first engaging member 331. In some specific examples, the first engaging member 331 is a magnetizable metal sheet such as but not limited to an iron sheet. The second engaging member 332 has a plurality of magnets 333 respectively fixed in the recesses 313. In other variations, the installation group 33 can be omitted, and the eye position observation piece 3 can be integrally formed and directly adhered to one end of the second seat body 221 as long as the eye position observation piece 3 can be folded towards the second seat body 221.

[0051] Such as Figure 6 And Figure 8As shown, through the arrangement of the installation group 33, the eye position observation piece 3 can be replaced and stored. In some specific examples, it can be replaced with another eye position observation piece 3 that is 106 degrees away from the magnifying lens 222. In some specific examples, as long as the angle between the eye position observation piece 3 and the magnifying lens 222 is between 90 degrees and 140 degrees, a better viewing range can be obtained. In some specific examples, the angle between the eye position observation piece 3 and the magnifying lens 222 is between 106 degrees and 130 degrees, which can obtain a better viewing range.

[0052] See also Figure 9 For example, when viewing a book 9 using the present embodiment, the magnifying lens 222 of the objective lens holder 22 will first magnify the image of the book 9 and reflect the image onto the reflective lens 212 of the eyepiece holder 21, and the user's line of sight can horizontally see the image on the reflective lens 212 through the viewing window 30 of the eye position observation sheet 3. In other words, the magnifying lens 222 is used to magnify the image and reflect the magnified image to the reflective lens 212, so that the reflective lens 212 can obtain an enlarged erect image without optical distortion. Therefore, the user can maintain an appropriate distance and height to view the enlarged erect image without leaning forward or lowering the head, and can also avoid excessive eye pressure, so that the user has better reading comfort.

[0053] It should be noted that when using this embodiment, the light source 24 provides sufficient light to obtain brighter imaging, but the light source 24 can also be omitted. As long as the lamps in the existing environment are used, the function of providing light can also be achieved.

[0054] See also Figure 10 The second embodiment of the present invention is similar to the first embodiment, except that:

[0055] The first engaging member 331 of the installation group 33 is one of a concave portion and a convex portion, and the second engaging member 332 is the other of the concave portion and the convex portion. In the present embodiment, the first engaging member 331 is a groove arranged in the second seat body 221, and the second engaging member 332 is a part of the fixed sheet body 31. As long as the second engaging member 332 of the fixed sheet body 31 is slid into the first engaging member 331, the eye position observation sheet 3 can be assembled in the objective lens seat 22. In some specific examples, the first engaging member 331 can be a convex portion arranged in the second seat body 221, and the second engaging member 332 can be a groove formed in the fixed sheet body 31, which also has the function of installation.

[0056] See also Figures 11 to 12, the third embodiment of the present utility model is similar to the first embodiment and includes a bracket unit 1, a lens base unit 2, and an eye position observation lens 3. The difference is that:

[0057] The third embodiment is used to electrically connect an electronic screen device 91 such as a mobile phone or a tablet, and is used to magnify the screen of the electronic screen device 91.

[0058] The base 11 and the support arm 12 are separate independent components. The base 11 is a tripod and has the advantage of being convenient for storage. The support arm 12 extends upright upward from the base 11 and its bottom end is fixed to the base 11.

[0059] The lens base unit 2 is slightly cube-shaped and has a front opening 20 for installing the eye position observation lens 3. The front opening 20 is rectangular and opens forward. In some specific examples, the lens base unit 2 has a transmission line 25 for electrically connecting the electronic screen device 91, such as a USB cable. The eyepiece lens base 21 is slightly in the shape of a right triangle. The objective lens base 22 is slightly in the shape of a right triangle. The second base body 221 is made of a fabric with stiffness and can be folded into the eyepiece lens base 21. Therefore, the lens base unit 2 can also be in the closed state (such as Figure 12 ) and the open state (such as Figure 11 ) to switch. When the lens base unit 2 is in the open state, the magnifying lens 222 is in a horizontal state. An image projection module and electronic components (not shown in the figure) are installed inside the eyepiece lens base 21. The image projection module is electrically connected to the electronic screen device 91 and is used to project the screen of the electronic screen device 91 through an optical path. The structure and the way of constructing the optical path of the image projection module are prior arts and have various variations. Since those with ordinary knowledge in the art can infer the extended details based on the above description, no further description will be given.

[0060] When in use, after the image projection module projects the screen of the electronic screen device 91 through the optical path, the magnified image will finally be reflected to the reflection lens 212 of the eyepiece lens base 21, and the user's line of sight can see the magnified positive image on the reflection lens 212 through the viewing window 30 of the eye position observation lens 3.

[0061] In some specific examples, the lens base unit 2 can omit the transmission line 25 and set a lens to shoot the screen of the electronic screen device 91 through the lens and transmit it to the image projection module, and the magnified positive image can also be seen on the reflection lens 212. Image transmission is a prior art and has various variations. Since those with ordinary knowledge in the art can infer the extended details based on the above description, no further description will be given.

[0062] Refer toFigure 13 , which is a variant form of the third embodiment. The lens base unit 2 is a box with a fixed shape. The left and right sides of the front opening 20 of the lens base unit 2 are concave arcs. The eyepiece lens base 21 and the objective lens base 22 are integrally connected and are approximately cube-shaped. The magnifying lens 222 is fixedly arranged horizontally. The base 11 is a tripod with a longer front and a shorter rear.

[0063] Refer to Figure 14 , which is another variant form of the third embodiment. The base 11 and the support arm 12 are both rectangular in shape, having the advantage of stable center of gravity. The lens base unit 2 is a box with a fixed shape. The eyepiece lens base 21 and the objective lens base 22 are integrally connected and are approximately cuboid-shaped. The magnifying lens 222 is fixedly arranged horizontally.

[0064] As can be seen from the foregoing, the lens base unit 2 of the present utility model has various external shape variations and various function expansions (such as opening and closing function, lifting function, anti-shake function, light supplement function). Basically, as long as the reflecting lens 212 and the magnifying lens 222 are provided, the magnified erect image without optical distortion can be obtained.

[0065] The present utility model can quickly obtain a good viewing range through the viewing window 30 of the eye position observation piece 3, enabling the user to quickly locate the optimal eye position height and viewing position, and avoiding interference of the line of sight by other objects, with relatively high practicality. In addition, the disassembly and assembly method of the eye position observation piece 3 in the foregoing embodiments is fast and simple, and can indeed achieve the purpose of the present utility model.

[0066] The above are only the embodiments of the present utility model, and the scope of implementation of the present utility model cannot be limited thereby. That is, all simple equivalent changes and modifications made according to the claims and the content of the specification of the present utility model still fall within the scope of the present utility model.

Claims

1. A high-power telescopic camera with an eye position observation lens, characterized in that: The high-shot telephoto lens includes: A bracket unit including a support arm; A lens base unit disposed on the support arm and including an eyepiece lens base and an objective lens base. The eyepiece lens base has a first body and a reflecting lens mounted on the first body. The objective lens base has a second body and a magnifying lens mounted on the second body. The magnifying lens is located above the reflecting lens in the up-down direction; and An eye position observation piece disposed on one side of the lens base unit and spaced opposite to the reflecting lens. The eye position observation piece has a viewing window with an area smaller than that of the reflecting lens and capable of viewing the reflecting lens.

2. The high-powered telescopic camera with an eye position observation lens according to claim 1, characterized in that: The viewing window is a rectangle with a width in the left-right direction greater than a height in the up-down direction.

3. The high-power telescopic camera with an eye position observation film according to claim 1, characterized in that: The objective lens base is rotatably shafted on the eyepiece lens base. The eye position observation piece is disposed on a side of the second body away from the support arm. The lens base unit can be switched between a closed state and an open state. In the closed state, the objective lens base covers the eyepiece lens base. In the open state, the objective lens base is opened relative to the eyepiece lens base, and the eye position observation piece is spaced opposite to the reflecting lens.

4. The high-magnification telescopic camera with an eye position observation lens according to claim 1, characterized in that: The eye position observation piece includes a fixed piece body disposed on the second body and a viewing window piece body connected to the fixed piece body. The viewing window piece body extends obliquely downward from the second body in a direction away from the eyepiece lens base.

5. The high-definition telescopic camera with an eye position observation lens according to claim 4, characterized in that: The eye position observation piece further includes a mounting group having a first engaging member disposed on the second body and a second engaging member disposed on the fixed piece body for engaging the first engaging member.

6. The high-power telescopic camera with an eye position observation lens according to claim 5, characterized in that: The first engaging member is a magnetizable metal piece, and the second engaging member is a magnet.

7. The high-magnification telescopic camera with an eye position observation lens according to claim 6, characterized in that: The fixed piece body has a fixed piece portion and an inclined piece portion extending obliquely downward from the fixed piece portion. The fixed piece portion has a plurality of recesses spaced apart. The second engaging member has a plurality of magnets respectively fixed in the recesses.

8. The high-magnification telescopic camera with an eye position observation lens according to claim 7, characterized in that: The inclined piece portion of the fixed piece body has an avoidance notch, and the viewing window is formed in the viewing window piece body and generally aligned with the avoidance notch.

9. The high-power telescopic camera with an eye position observation lens according to claim 5, characterized in that: The first engaging member is one of a convex portion and a concave portion, and the second engaging member is the other of the convex portion and the concave portion.

10. The high-power telescopic camera with an eye position observation lens according to claim 1, characterized in that: The bracket unit further includes a base. The support arm extends obliquely upward from the base. The eyepiece lens base is slidably disposed on the support arm.

11. The high-magnification telescopic camera with an eye position observation lens according to claim 3, characterized in that: The lens base unit further includes at least one support group having a support rod. When the lens base unit is in the open state, the support rod supports between the first body and the second body.

12. The high-power telescopic camera with an eye position observation lens according to claim 3, characterized in that: When the lens base unit is in the open state, the eye position observation piece and the magnifying lens are clamped at an angle of 90 degrees to 140 degrees.

13. The high-power telescopic camera with an eye position observation lens according to claim 1, characterized in that: Suitable for electrically connecting to an electronic screen device and used for magnifying the picture of the electronic screen device on the reflecting lens. The lens base unit further includes a transmission line for electrically connecting to the electronic screen device.

14. The high-power telescopic camera with an eye position observation lens according to claim 1, characterized in that: The lens base unit is in a rectangular body shape and has a front opening for the eye position observation piece to be disposed.

15. The high-magnification telescopic camera with an eye position observation lens according to claim 1, characterized in that: The second body is made of a cloth with stiffness, and the second body can be folded into the eyepiece lens base.

16. The high-power telescopic camera with an eye position observation lens according to claim 1, wherein: The magnifying lens is in a horizontal shape.

17. The high-definition telescopic camera with an eye position observation lens according to claim 1, characterized in that: The bracket unit further includes a base, the support arm extends upward from the base, and the base is a tripod.

18. The high-powered telescopic camera with an eye position observation lens according to claim 1, characterized in that: The bracket unit further includes a base, the support arm extends upward from the base, and both the base and the support arm are rectangular.

Images