CN214409447U - High-magnification imaging eyepiece structure - Google Patents
High-magnification imaging eyepiece structure Download PDFInfo
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- CN214409447U CN214409447U CN202120282375.7U CN202120282375U CN214409447U CN 214409447 U CN214409447 U CN 214409447U CN 202120282375 U CN202120282375 U CN 202120282375U CN 214409447 U CN214409447 U CN 214409447U
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Abstract
The utility model discloses a high magnification formation of image eyepiece structure, it sets up the light path between aperture diaphragm and display screen, high magnification formation of image eyepiece structure include: first lens, cemented lens, the fourth lens that follow same light path direction and arrange in proper order, the position between first lens, cemented lens, the fourth lens is fixed relatively, the eyepiece structure still including adjust first lens/cemented lens/fourth lens with the adjustment mechanism of interval before the display screen. The light information of display screen loops through protection window, fourth lens, cemented lens, first lens and aperture diaphragm to show enlarged image in aperture diaphragm department, help people's eye improves discrimination, the utility model discloses a structure special part lies in compressing light with a slice cemented lens, thereby obtains the eyepiece system of big exit pupil diameter, big eye point distance, can dock OLED display screen or LCOS display screen, has small, the quality is light, resolution ratio is higher, the great characteristics of magnification.
Description
Technical Field
The utility model relates to an eyepiece technical field, concretely relates to high magnification formation of image eyepiece structure.
Background
The thermal infrared imager receives an infrared radiation energy distribution pattern of a detected target by using an infrared detector and an optical imaging objective lens, reflects the infrared radiation energy distribution pattern on a photosensitive element of the infrared detector, and transmits a signal to a display screen to form a thermal image corresponding to a thermal distribution field on the surface of an object. The thermal image on the display screen can not be directly observed by human eyes, and can be observed by the human eyes after being amplified by the ocular lens, and the ocular lens can help the human eyes to improve the identification capability.
The magnifying power is one of the key optical parameters of the ocular lens, and an ocular lens structure which has great significance for improving the identification capability and high resolution image quality of an image, can adjust the visual acuity and can be suitable for the diopter of each human eye is needed at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned technique not enough, provide a high magnification formation of image eyepiece structure, solve at least one technical problem who proposes in the background art.
In order to achieve the above technical purpose, the technical scheme of the utility model a high magnification imaging eyepiece structure is provided, its light path that sets up between aperture diaphragm and display screen, high magnification imaging eyepiece structure include: first lens, cemented lens, the fourth lens that follow same light path direction and arrange in proper order, position relatively fixed between first lens, cemented lens, the fourth lens, high magnification formation of image eyepiece structure including adjust first lens/cemented lens/fourth lens with the adjustment mechanism of interval before the display screen.
Furthermore, a first preset distance is arranged between the light incident surface of the aperture diaphragm and the light emergent surface of the first lens, a second preset distance is arranged between the light incident surface of the first lens and the light emergent surface of the cemented lens, a third preset distance is arranged between the light incident surface of the cemented lens and the light emergent surface of the fourth lens, and a fourth preset distance is arranged between the light incident surface of the fourth lens and the light emergent surface of the display screen.
Further, high magnification imaging eyepiece structure still include the protection window, the protection window set up in the fourth lens in between the display screen, the income plain noodles of fourth lens with be provided with the fifth predetermined distance between the play plain noodles of protection window, the income plain noodles of protection window with be provided with the sixth predetermined distance between the play plain noodles of display screen.
Further, the first lens is a biconvex or meniscus lens.
Furthermore, the cemented lens comprises a left lens and a right lens which are fixed in a cemented manner, the left lens is a biconvex lens or a meniscus lens, and the right lens is a biconcave lens or a meniscus lens.
Further, the fourth lens is a biconvex or meniscus lens.
Further, the protection window is round or square.
Further, high magnification formation of image eyepiece structure still include interface seat, main lens cone, clamping ring, be provided with three ladder face in the main lens cone at least, it is three but ladder face one-to-one gives first lens, cemented lens, fourth lens are fixed a position, the main lens cone with first lens, cemented lens, fourth lens relatively fixed, clamping ring coaxial threaded connection in the one end of main lens cone, and restriction first lens, cemented lens, fourth lens roll-off the main lens cone, the interface seat slip cap is located the main lens cone, the waist type hole that runs through its inner and outer peripheral face is seted up to the interface seat, and the waist in waist type hole with the optical axis of first lens is parallel, the outer peripheral face slip cap of interface seat is equipped with the guide ring, be provided with connecting portion in the waist type hole, the both ends of connecting portion respectively with the guide ring, The main lens cone is fixedly connected, the connecting portion can only slide along the waist of the waist-shaped hole, external threads are arranged on the outer peripheral surface of the guide ring, the adjusting mechanism is a focusing ring which is rotatably sleeved on the interface seat, the focusing ring is axially fixed relative to the interface seat, and internal threads matched with the external threads on the outer peripheral surface of the guide ring are arranged on the inner peripheral surface of the focusing ring.
Furthermore, one side of the outer peripheral surface of the interface seat is provided with a limit ring fixedly connected with the interface seat, the other side of the outer peripheral surface of the interface seat is provided with a compression ring coaxially connected with the interface seat in a threaded manner, two ends of the focusing ring are provided with annular clamping grooves, one annular clamping groove is rotatably clamped with the limit ring, the other annular clamping groove is rotatably clamped with the compression ring, and the guide ring is arranged in an annular cavity formed by the limit ring, the compression ring, the focusing ring and the interface seat in a surrounding manner and slides.
Furthermore, inert gases are filled in cavities among the first lens, the cemented lens and the fourth lens.
Compared with the prior art, the beneficial effects of the utility model include: the utility model discloses at the during operation, the light information of display screen loops through protection window, fourth lens, cemented lens, first lens and aperture stop to show enlarged image in aperture stop department, help people's eye improves the discriminative power, the utility model discloses a structure special part lies in compressing light with a slice cemented lens, thereby obtains the eyepiece system of big exit pupil diameter, big eye point distance, can dock OLED display screen or LCOS display screen, has characteristics small, that the quality is light, the resolution ratio is higher, and magnification is great.
Drawings
FIG. 1 is a schematic diagram of a lens position of an embodiment of a high magnification imaging eyepiece structure provided by the present invention;
fig. 2 is a schematic perspective view of an embodiment of a high-magnification magnifying imaging eyepiece structure provided by the present invention;
FIG. 3 is a schematic view of the focusing ring of FIG. 2 with the focusing ring removed;
FIG. 4 is a schematic view of the structure of FIG. 3 with the guide ring removed;
fig. 5 is a schematic cross-sectional structure view of a first adjusting position of the high-magnification magnifying imaging eyepiece structure provided by the present invention;
fig. 6 is a schematic view of a second position-adjustable section structure of a high-magnification magnifying imaging eyepiece structure provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 6, the present embodiment provides a high-magnification imaging eyepiece structure disposed on an optical path between an aperture stop 1 and a display screen 6, the high-magnification imaging eyepiece structure including: first lens 2, cemented lens 3, fourth lens 4 that follow same light path direction and arrange in proper order, position between first lens 2, cemented lens 3, the fourth lens 4 is relatively fixed, high magnification formation of image eyepiece structure including adjusting first lens 2/cemented lens 3/fourth lens 4 with the adjustment mechanism of interval before the display screen 6.
In this embodiment, a first predetermined distance is disposed between the light incident surface of the aperture stop 1 and the light emitting surface of the first lens 2, a second predetermined distance is disposed between the light incident surface of the first lens 2 and the light emitting surface of the cemented lens 3, a third predetermined distance is arranged between the light incident surface of the cemented lens 3 and the light emergent surface of the fourth lens 4, a fourth preset distance is arranged between the light incident surface of the fourth lens 4 and the light emergent surface of the display screen 6, the high-magnification magnifying imaging eyepiece structure further comprises a protection window 5, the protection window 5 is arranged between the fourth lens 4 and the display screen 6, a fifth preset distance is arranged between the light incident surface of the fourth lens 4 and the light emergent surface of the protection window 5, and a sixth preset distance is arranged between the light incident surface of the protection window 5 and the light emergent surface of the display screen 6.
Specifically, be 5.5mm according to the exit pupil diameter of OLED display screen design, the eyepoint is 20 mm's eyepiece system apart from, is right the utility model discloses, require the eyepiece that has high magnification and big eyepoint apart from, and still require to match the LCOS display screen. LCOS display screen generally adopts long focus optical system, and the eyepiece of big exit pupil and big eye point distance generally requires to adopt the optical system of short focal length, under such condition, must lead to very big incident angle to arouse great aberration, so the utility model discloses a structure special part just lies in compressing light with a slice cemented lens 3, thereby obtains the eyepiece system of big exit pupil diameter, big eye point distance.
The working wave band of the utility model is a visible light wave band, and the design adopts 0.656 mu m C light, 0.587 mu m D light and 0.486 mu m F light; the exit pupil distance of the product is 20mm, and the total length of the system is 40-50mm (including the exit pupil distance);
when designing, the utility model discloses confirm the magnification for 20 times, according to the magnification who confirms, confirm the utility model discloses a focus is around near 12.5 mm. The reverse design is adopted, namely, the image reaches the aperture diaphragm from the enlarged virtual image at the far end, then is transmitted from the aperture diaphragm in the positive direction, passes through the first lens 2, the cemented lens 3 and the fourth lens 4, and then reaches the window (the protection window 5). Wherein the human eye is represented by an aperture diaphragm 1, and in the present product, the diameter of the aperture diaphragm 1 is set to 5.5 mm.
For the convenience of understanding and full implementation of the reader, it should be noted that the present invention adopts a reverse design in design, which is opposite to the light path in normal use, and the following light movement directions are reverse descriptions:
the distance between the light-emitting surface of the aperture diaphragm 1 and the light-in surface of the first lens 2 is 20 mm. The first lens 2 is a meniscus lens.
The distance between the light-emitting surface of the first lens 2 and the light-in surface of the cemented lens 3 is 0.2-1mm, the left lens of the cemented lens 3 is a meniscus lens, and the right lens is a meniscus lens.
The distance between the light-emitting surface of the cemented lens 3 and the light-in surface of the fourth lens 4 is 1mm-2mm, and the fourth lens 4 is an irregular spherical lens.
The distance between the light-emitting surface of the fourth lens 4 and the light-in surface of the window (the protection window 5) is 1.3mm-4mm, the window is circular, and the rear intercept can be adjusted within +/-5D.
The first lens 2 is made of heavy lanthanum flint glass with the refractive index of 1.7-2.0 and the Abbe number of 20-50; the left lens of the cemented lens 3 is made of heavy lanthanum flint glass with the refractive index of 1.7-2.0 and the Abbe number of 20-50; the right lens of the cemented lens 3 is made of heavy flint glass with the refractive index of 1.7-2.0 and the Abbe number of 10-30; the fourth lens 4 is made of lanthanum flint glass with the refractive index of 1.8-2.0 and the Abbe number of 30-50.
The lens of the first lens 2 can be selected from heavy lanthanum flint glass such as H-ZLAF51, H-ZLAF52A, H-ZLAF52E, H-ZLAF52D and the like; the left lens of the cemented lens 3 can be selected from heavy lanthanum flint glass such as H-ZLAF51, H-ZLAF52A, H-ZLAF52E, H-ZLAF52D and the like; the right lens of the cemented lens 3 can be selected from H-ZF88, H-ZF72A, H-ZF62 and other heavy flint glasses; the fourth lens 4 can be made of lanthanum flint glass such as D-LAF52LA, D-LAF50, D-LAF61 and the like. In order to ensure that the product can meet the European detection standard, the materials selected for the product lens pass the RoHS test.
The utility model discloses, according to the virtual image to the eyes, design to the direction of display screen 6 again. The first lens 2 adopts high-refractive-index transmission, two lenses of the cemented lens 3 adopt heavy lanthanum flint glass and heavy flint glass with higher refractive index to be matched in order not to generate overlarge high-level aberration, and two originally independent lenses are cemented in order to reduce field curvature; the fourth lens 4 is used to eliminate aberration and smooth the output of light.
In this embodiment, the high-magnification magnifying imaging eyepiece structure further includes an interface seat a1, a main barrel a2, and a pressing ring a3, where at least three stepped surfaces are provided in the main barrel a2, the three stepped surfaces can be used to position the first lens 2, the cemented lens 3, and the fourth lens 4 in a one-to-one correspondence manner, the main barrel a2 is fixed to the first lens 2, the cemented lens 3, and the fourth lens 4 relatively, the pressing ring a3 is coaxially and threadedly connected to one end of the main barrel a2 and limits the first lens 2, the cemented lens 3, and the fourth lens 4 to slide out of the main barrel a2, the interface seat a1 is slidably sleeved on the main barrel a2, the interface seat a1 is provided with a waist-shaped hole c penetrating through an inner and outer peripheral surface thereof, a waist of the waist-shaped hole c is parallel to an optical axis of the first lens 2, an outer peripheral surface of the interface seat a1 is slidably sleeved with a guide ring a4, a connecting part a5 is arranged in the waist-shaped hole c, two ends of the connecting part a5 are respectively fixedly connected with the guide ring a4 and the main lens cone a2, and the connecting portion a5 can only slide along the waist of the waist-shaped hole c, the outer circumference of the guide ring a4 is provided with external threads, the adjusting mechanism is a focusing ring a6 which is rotatably sleeved on the interface seat a7, the focusing ring a6 is axially fixed relative to the interface seat a1, the inner circumferential surface of the focus ring a1 is provided with an internal thread which is matched with the external thread on the outer circumferential surface of the guide ring a4, in particular, the number of the waist-shaped holes c is two, the two waist-shaped holes c are distributed at 180 degrees on the interface seat a1, the connecting portion a5 is a screw for positioning, the screw tail of the connecting portion a5 is in threaded connection with a threaded hole formed in the outer peripheral surface of the main lens barrel a2, and the screw head of the connecting portion a5 is embedded in a round hole formed in the guide ring a 4.
Specifically, one side of the outer peripheral surface of the interface seat a1 is provided with a limit ring a11 fixedly connected with the interface seat a1, the other side of the outer peripheral surface of the interface seat a1 is provided with a press ring a7 coaxially connected with the interface seat a through threads, two ends of the focusing ring a6 are respectively provided with an annular clamping groove, one annular clamping groove is rotatably clamped with the limit ring a11, the other annular clamping groove is rotatably clamped with the press ring a7, and the guide ring a4 slides in an annular cavity formed by the limit ring a11, the press ring a7, the focusing ring a6 and the interface seat a1 in a surrounding mode. All be filled with inert gas or nitrogen gas in the cavity between first lens 2, cemented lens 3, the fourth lens 4, be provided with first packing ring b1 that the aluminum alloy material made between first lens 2 and the cemented lens 3, be provided with second packing ring b2 that the aluminum alloy material made between cemented lens 3, the fourth lens 4, above-mentioned structure equipment is convenient, has improved the convenience of the equipment of eyepiece structure and maintenance greatly.
The above description of the present invention does not limit the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. The utility model provides a high magnification formation of image eyepiece structure, its sets up on the light path between aperture diaphragm and the display screen, its characterized in that, high magnification formation of image eyepiece structure include: first lens, cemented lens, the fourth lens that follow same light path direction and arrange in proper order, position relatively fixed between first lens, cemented lens, the fourth lens, high magnification formation of image eyepiece structure still including adjusting first lens/cemented lens/fourth lens with the adjustment mechanism of interval before the display screen.
2. The high-power magnifying imaging eyepiece structure of claim 1, wherein a first predetermined distance is disposed between the light incident surface of the aperture stop and the light exit surface of the first lens, a second predetermined distance is disposed between the light incident surface of the first lens and the light exit surface of the cemented lens, a third predetermined distance is disposed between the light incident surface of the cemented lens and the light exit surface of the fourth lens, and a fourth predetermined distance is disposed between the light incident surface of the fourth lens and the light exit surface of the display screen.
3. The high-power magnifying imaging eyepiece structure of claim 1, further comprising a protection window disposed between the fourth lens and the display screen, wherein a fifth predetermined distance is disposed between the light incident surface of the fourth lens and the light emitting surface of the protection window, and a sixth predetermined distance is disposed between the light incident surface of the protection window and the light emitting surface of the display screen.
4. The high power magnifying imaging eyepiece structure of claim 1, wherein the first lens is a biconvex or meniscus lens.
5. The eyepiece structure for high power magnification imaging according to claim 1, wherein the cemented lens comprises a left lens and a right lens that are cemented together, the left lens being a biconvex or meniscus lens and the right lens being a biconcave or meniscus lens.
6. The high power magnifying imaging eyepiece structure of claim 1, wherein the fourth lens is a biconvex or meniscus lens.
7. The high-magnification imaging eyepiece structure of claim 3, wherein the protective window is circular or square.
8. The high-power magnifying imaging eyepiece structure according to claim 1, wherein the high-power magnifying imaging eyepiece structure further comprises an interface seat, a main lens barrel, and a pressing ring, wherein at least three stepped surfaces are disposed in the main lens barrel, the three stepped surfaces can be used for positioning the first lens, the cemented lens, and the fourth lens in a one-to-one correspondence manner, the main lens barrel is fixed with the first lens, the cemented lens, and the fourth lens relatively, the pressing ring is coaxially and threadedly connected to one end of the main lens barrel and limits the first lens, the cemented lens, and the fourth lens to slide out of the main lens barrel, the interface seat is slidably sleeved on the main lens barrel, the interface seat is provided with a waist-shaped hole penetrating through the inner and outer peripheral surfaces of the interface seat, the waist of the waist-shaped hole is parallel to the optical axis of the first lens, and the outer peripheral surface of the interface seat is slidably sleeved with a guide ring, the adjusting mechanism is a focusing ring which is rotatably sleeved on the interface seat, the focusing ring is axially fixed relative to the interface seat, and the inner peripheral surface of the focusing ring is provided with an internal thread matched with the external thread on the outer peripheral surface of the guide ring.
9. The high-magnification imaging eyepiece structure according to claim 8, wherein a limiting ring fixedly connected to the interface seat is arranged on one side of the outer peripheral surface of the interface seat, a pressing ring coaxially screwed to the interface seat is arranged on the other side of the outer peripheral surface of the interface seat, annular clamping grooves are arranged at both ends of the focusing ring, one annular clamping groove is rotatably clamped to the limiting ring, the other annular clamping groove is rotatably clamped to the pressing ring, and the guide ring slides in an annular cavity formed by the limiting ring, the pressing ring, the focusing ring and the interface seat in a surrounding manner.
10. The high-power magnifying imaging eyepiece structure of claim 1, wherein a cavity between the first lens, the cemented lens, and the fourth lens is filled with an inert gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120282375.7U CN214409447U (en) | 2021-02-01 | 2021-02-01 | High-magnification imaging eyepiece structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120282375.7U CN214409447U (en) | 2021-02-01 | 2021-02-01 | High-magnification imaging eyepiece structure |
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| CN214409447U true CN214409447U (en) | 2021-10-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120282375.7U Active CN214409447U (en) | 2021-02-01 | 2021-02-01 | High-magnification imaging eyepiece structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114114669A (en) * | 2021-12-02 | 2022-03-01 | 湖北华中光电科技有限公司 | Translation lens type focusing waterproof eyepiece |
-
2021
- 2021-02-01 CN CN202120282375.7U patent/CN214409447U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114114669A (en) * | 2021-12-02 | 2022-03-01 | 湖北华中光电科技有限公司 | Translation lens type focusing waterproof eyepiece |
| CN114114669B (en) * | 2021-12-02 | 2024-02-09 | 湖北华中长江光电科技有限公司 | Translation lens type focusing waterproof eyepiece |
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