CN110658622A - Automatic-adjustment micro-display optical eyepiece and adjustment method thereof - Google Patents
Automatic-adjustment micro-display optical eyepiece and adjustment method thereof Download PDFInfo
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B25/00—Eyepieces; Magnifying glasses
- G02B25/001—Eyepieces
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
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Abstract
The invention belongs to the technical field of micro-displays, and discloses an automatically-adjusted micro-display optical eyepiece and an adjusting method thereof, wherein the micro-display optical eyepiece comprises a micro-lens frame, a lens component fixed in the lens frame, and an outer movable lens barrel sleeved at one end of the lens frame, wherein the lens component comprises a fixed lens component and an adjustable lens component; the position of the outer movable lens barrel can be adjusted back and forth through the second adjusting mechanism; the traditional eyepiece structure is separated into the outer movable lens barrel, the fixed lens assembly and the adjustable lens assembly, wherein the outer movable lens barrel and the adjustable lens assembly can move along the axial direction of the lens frame under the driving of the adjusting mechanism, so that the lens spacing and the zoom multiple in the whole eyepiece are changed, the invention can be effectively adapted to micro display screens with different specifications, and the problem of incompatibility between the traditional eyepiece and micro displays with different sizes is solved.
Description
Technical Field
The invention belongs to the technical field of micro-displays, and particularly relates to an automatically-adjusted micro-display optical eyepiece and an adjusting method thereof.
Background
The micro display is used as a core display device of the portable equipment and is responsible for information communication between human eyes and the equipment. Since the pixels of the micro-display are in the order of 1-10 microns, and the diagonal of the display area is about 1 inch, the human eye can hardly directly observe the display picture and must realize the display picture through optical magnification.
The common optical magnification equipment is an optical eyepiece matched with the micro display; the optical eyepiece is formed based on a plurality of lens combinations and has a certain degree of magnification; for the existing optical eyepiece, the combination form and the installation position of the lens are fixed, so that the formed magnification factor is also fixed, and when the micro-displays with different sizes are observed, the optical eyepiece with different magnification factors needs to be matched, so that the problem that the optical eyepieces used by the micro-displays with different sizes are incompatible easily occurs, and the problem of timeliness of observation of the micro-displays with different sizes is influenced.
Disclosure of Invention
The invention aims to provide an automatic adjusting optical eyepiece of a micro display and an adjusting method thereof, which are used for solving the problem that the optical eyepieces used by micro displays with different sizes are incompatible.
In order to achieve the purpose, the invention provides the following technical scheme:
1. an automatic electrically adjusted microdisplay optical eyepiece, comprising: the micro display screen adapter comprises a micro lens frame, a lens assembly fixed in the lens frame and an outer movable lens barrel sleeved at one end of the lens frame, wherein the lens assembly comprises a fixed lens assembly and an adjustable lens assembly, and one end of the outer movable lens barrel is used for fixing a micro display screen adapter seat with at least one dimension;
the position of the outer movable lens barrel can be adjusted back and forth through the second adjusting mechanism; the adjustable lens component comprises an inner movable lens barrel, a lens is fixed in the inner movable lens barrel, and the inner movable lens barrel can be adjusted back and forth through a first adjusting mechanism.
Preferably, at least one connecting rod is fixedly arranged on one side of the inner movable lens barrel, the connecting rod penetrates through the lens frame and is fixedly connected with a movable sleeve at the movable end, and the movable sleeve is matched with the first adjusting mechanism to realize the driving of the first adjusting mechanism on the adjustable lens component.
Preferably, the first adjusting mechanism comprises a first adjusting motor and a first lead screw, and the first lead screw is driven by the first adjusting motor; the second adjusting mechanism comprises a second adjusting motor and a second lead screw, and the second lead screw is driven by the second adjusting motor.
Preferably, the control system further comprises a master control eyepiece control unit, the master control eyepiece control unit adjusts the first adjusting motor and the second adjusting motor through preset motor adjusting parameters, and the master control eyepiece control unit is provided with a manual switch.
Preferably, a first encoder is arranged on the first adjusting motor in a matched mode, a second encoder is arranged on the second adjusting motor in a matched mode, and the first encoder and the second encoder convert the rotary displacement formed by the driving of the first adjusting motor and the driving of the second adjusting motor into electric signals respectively and are matched with the main control piece to accurately control the moving amplitude of the adjustable inner movable lens barrel and the adjustable outer movable lens barrel.
Preferably, the glasses cover is further included, and the glasses cover is fixed at one end of the lens frame for human eye observation.
Preferably, the main control comprises a control module, a driving module and an input module;
the control module is used for receiving a feedback signal of the driving module, providing a control signal for the driving module and simultaneously being directly matched with the first encoder and the second encoder for use;
the input module is used for manually inputting the size and the observation size of the micro display;
the driving module comprises a driving unit and a recording and storing unit, wherein the driving unit directly drives the first adjusting motor and the second adjusting motor, and the recording and storing unit records the adjusting parameters of the first adjusting motor and the second adjusting motor and forms automatic adaptation by combining the adjusting parameters with the size input by the input module.
2. An adjustment method applied to the electrically adjusted microdisplay optical eyepiece, comprising the steps of:
s1, embedding the micro display into the outer movable lens barrel, and inputting the size and the observation size of the corresponding micro display through the input module;
s2, the driving module determines corresponding focal length parameters according to the input size, and then determines the distance between adjacent lenses according to the zoom multiple;
s3, feeding back the distance to a control module after the distance is determined, controlling the drive module to start by the control module, driving a first adjusting motor and a second adjusting motor by the drive module to drive a first lead screw (122) and a second lead screw to rotate, further driving an inner movable lens barrel and an outer movable lens barrel to move, and adjusting the position of a corresponding structure, wherein a first encoder and a second encoder which are arranged on the first adjusting motor and the second adjusting motor convert the displacement generated by the rotation of the first adjusting motor and the second adjusting motor into electric signals and transmit the electric signals to the control module;
and S4, when the displacement measured by the first encoder and the second encoder is consistent with the adaptive distance of the driving module, the control module sends a driving stopping control signal, and the driving module stops driving to finish the automatic adaptation of the ocular and the micro display screen.
Preferably, in the step S2, the focal length parameters at least include a distance x between the adjustable lens assembly b and the fixed lens assembly a, and a distance between the lens d and the microdisplay; and obtaining a zoom multiple according to the matching of the two distances.
Preferably, the relationship between the zoom factors and the inner and outer movable lens barrels using the lens combination is as follows:
the zoom factor R is calculated by the formula:
R＝9.79356-0.0874x
the distance between the lens d and the microdisplay is calculated by the formula:
y＝28.1679+0.0878398+0.000662338x2。
compared with the prior art, the invention has the following beneficial effects:
(1) the traditional eyepiece structure is separated into the outer movable lens barrel, the fixed lens assembly and the adjustable lens assembly, wherein the outer movable lens barrel and the adjustable lens assembly can move along the axial direction of the lens frame under the driving of the first adjusting mechanism, and further the lens interval and the zoom multiple in the whole eyepiece are changed, so that the eyepiece provided by the invention can be effectively adapted to micro-display screens with different specifications, and the problem of incompatibility between the traditional eyepiece and micro-displays with different sizes is solved.
(2) The adjusting mechanism is composed of an adjusting motor and a lead screw, the driving cost is low, the structure is stable, the quality of the ocular lens is effectively guaranteed, and the service life of the ocular lens is effectively prolonged.
(3) The adjusting motor is provided with the encoder and is matched with the main control for use, so that accurate detection of the adjusting motor is realized, and the moving precision of the adjustable lens component is ensured.
(4) Regarding the main control, the automatic control and the automatic drive of the adjusting mechanism are formed under the coordination of the control module, the driving module and the input module, so that the integral eyepiece forms fool operation, and good practicability is achieved.
(5) Based on the parallel connection of the manual switch and the main control, the effective formation of the whole automatic driving adjustment is ensured, and the manual driving of the adjustable lens component can be realized, so that the requirement of manual focusing is met.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is a block diagram of the structure of a primary control in the present invention;
FIG. 4 is a simplified diagram of the transmission of light of the lens assembly of the present invention;
FIG. 5 is a schematic view of the light transmission variation of the present invention;
FIG. 6 is a circuit diagram of a first adjustment mechanism of the present invention;
in the figure: 10-lens frame, 11-lens assembly, 12-first adjusting mechanism, 121-first adjusting motor, 1211-first encoder, 122-first lead screw, 123-moving sleeve, 124-connecting rod, 13-main control eyepiece control unit, 131-control module, 132-driving module, 133-input module, 14-inner movable lens barrel, 15-eyepiece cover, 16-outer movable lens barrel, 17-second adjusting mechanism, 171-second adjusting motor, 1711-second encoder, 172-second lead screw
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
First embodiment
Referring to fig. 1-5, the present invention provides the following technical solutions: an electrically adjusted micro-display optical eyepiece comprises a micro-lens frame 10, at least two lens assemblies 11 fixed in the lens frame 10 and an outer movable lens barrel 16 sleeved at one end of the lens frame 10, wherein the lens assemblies 11 respectively comprise a fixed lens assembly and an adjustable lens assembly, one end of the outer movable lens barrel 16 is used for fixing at least one micro-display screen adapting seat with one dimension specification, and the display screen adapting seat is used for installing a micro-display screen; the size of the micro display screen is 0.3-0.7 inch;
the device also comprises a first adjusting mechanism 12 and a second adjusting mechanism 17, and the position of the outer movable lens barrel 16 can be adjusted back and forth through the second adjusting mechanism; the adjustable lens assembly comprises an inner movable lens barrel 14, a lens is fixed in the inner movable lens barrel 14, and the inner movable lens barrel 14 can be adjusted back and forth through a first adjusting mechanism;
the adjustable lens assembly includes an inner movable barrel 14, and a lens is fixed in the inner movable barrel 14.
Specifically, referring to fig. 1, the lens assembly 11 has four lens assemblies, but is not limited to only four lens assemblies, where b is an adjustable lens assembly and moves back and forth in the direction indicated by the arrow in fig. 1, a/c/d is a fixed lens assembly, and each of the a/b/c/d includes one lens;
as shown in fig. 4, the four lenses form mirror surfaces of S1-S8 from left to right; and the four lenses are all designed by double aspherical mirrors, wherein the design expression formula of the aspherical mirrors is as follows:
in addition, the parameters required in the calculation process using the above formula are as follows:
in the above table
All in mm;
as can be seen from the above table, the glass used for the lens is BK7 or SF 8;
further, as shown in fig. 5, when the eyepiece provided by the present invention is actually used, the adjustment of the magnification of the whole eyepiece is realized by the movement of the adjustable lens assembly b and the movement of the outer movable lens barrel 16: when the outer movable lens barrel 16 and the adjustable lens assembly b move in the opposite direction as shown by the arrow in fig. 5, the magnification of the whole eyepiece is gradually increased, i.e., the display from left to right in fig. 5; conversely, the overall magnification decreases gradually when moving in the direction indicated by the arrow in fig. 5, i.e., from right to left in fig. 5.
The relation formula of the inner movable lens cone and the outer movable lens cone of the lens combination and the magnification is as follows:
the zoom factor R is calculated by the formula:
R＝9.79356-0.0874x
the distance between the lens d and the microdisplay is calculated by the formula:
y＝28.1679+0.0878398+0.000662338x2
in this embodiment, it is preferable that a master control eyepiece control unit 13 is further included, and the master control eyepiece control unit 13 automatically drives the first adjustment mechanism 12 and the second adjustment mechanism 17.
In this embodiment, it is preferable that a connecting rod 124 is welded to one side of the inner movable barrel 14, the connecting rod 124 passes through the lens frame 10, and a moving sleeve 123 is welded to the movable end, and the moving sleeve 123 is matched with the first adjusting mechanism 12 to realize driving of the adjustable lens assembly by the first adjusting mechanism 12.
In this embodiment, preferably, the first adjusting mechanism 12 includes a first adjusting motor 121 and a first lead screw 122, and the first lead screw 122 is driven by the first adjusting motor 121; the second adjustment mechanism 17 includes a second adjustment motor 171 and a second lead screw 172, and the second lead screw 172 is driven by the second adjustment motor 171.
Further, it is preferable that the first adjustment motor 121 is a stepping motor;
specifically, as shown in fig. 1, when the outer movable lens barrel 16 is driven, the second adjustment motor 171 is fixed to the outer movable lens barrel 16, the lead screw is fixed to the lens frame 10, the stepping motor is driven to move along the lead screw, so as to drive the outer movable lens barrel 16 to move synchronously, and the micro display screen is fixed to the outer movable lens barrel 16, so that the distance between the lens assembly 11 and the micro display screen can be effectively adjusted by the movement;
as shown in fig. 1-2, when the inner movable lens barrel 14 is driven, the movable sleeve 123 is sleeved on the lead screw and is screwed with the movable sleeve 123, the first adjusting motor 121 drives the first lead screw 122 to rotate, so that the lead screw is screwed with the movable sleeve 123 to drive the movable sleeve 123 to move, the movable sleeve 123 drives the inner movable lens barrel 14 to move through the connecting rod 124, and the inner movable lens barrel 14 axially slides along the inner wall of the lens frame 10, so as to effectively change the distance between a/b and b/c;
in this embodiment, a fixed diaphragm is preferably provided between the lens assemblies c/d.
In this embodiment, preferably, the first adjustment motor 121 is provided with a first encoder 1211, the second adjustment motor 171 is provided with a second encoder 1711, and the first encoder 1211 and the second encoder 1711 convert the rotational displacement formed by the driving of the first adjustment motor 121 and the driving of the second adjustment motor 171 into electrical signals, and cooperate with the main control eyepiece control unit 13 to precisely control the moving amplitudes of the adjustable inner movable barrel 14 and the adjustable outer movable barrel 16;
in this embodiment, preferably, the main control eyepiece control unit 13 includes a control module 131, a driving module 132, and an input module 133;
the control module 131 is configured to receive a feedback signal of the driving module 132, provide a control signal for the driving module 132, and directly cooperate with the first encoder 1211 and the second encoder 1711;
the input module 133 is used for manually inputting the size and the observation size of the microdisplay; the specific input module 133 may be formed by combining a plurality of keys, and each key corresponds to a different microdisplay size, for example, five keys are provided, and the corresponding microdisplay size is 0.3/0.4/0.5/0.6/0.7 inch, and when different microdisplays are observed, the corresponding size is selected by the corresponding key.
The driving module 132 includes a driving unit and a recording storage unit, wherein the driving unit directly drives the first adjustment motor 121 and the second adjustment motor 171, and the recording storage unit records the adjustment parameters of the first adjustment motor 121 and the second adjustment motor 171, and thus forms an automatic adaptation in combination with the size input by the input module 133;
in summary, the adjustable lens assembly is moved to a designated position by the adjustment of the first adjustment motor 121 and the second adjustment motor 171, so that the whole eyepiece is effectively adapted to microdisplays with different sizes.
Further, the first adjustment motor 121 and the second adjustment motor 171 may be a stepping motor, and the adjustment parameters at least include the motor phase number, half-step angle, full-step angle, torque, and step angle accuracy (error between the actual value and the theoretical value of each step angle that the stepping motor rotates); a specific two-phase 86BYG250A stepping motor is taken as an example: the motor has two phases, a half-step angle of 0.9 degrees, an entire step angle of 1.8 degrees, a torque of 2 N.m and a step angle precision of less than 5 percent;
further, the focal length parameters at least comprise the distance between the adjustable lens assembly b and the fixed lens assembly a/c, the distance between the outer movable lens barrel 16 and the fixed lens assembly d, and a zoom multiple obtained by matching the two distances; the following parameter table is specifically taken as an example:
| eyepiece lens | Multiple of zoom | Total length of | Design wavelength | Maximum diameter |
| Actual parameters | 6.3X-11X | 65mm | RGB natural light | 34mm |
When the eyepiece is used according to the structure provided by the present embodiment:
(1) embedding the microdisplay in the outer movable barrel 16, and then inputting the size and viewing size of the corresponding microdisplay through the input module 133 (e.g., a microdisplay with 0.7 inch original size, viewing size is 7 inch);
(2) the driving module 132 determines a corresponding focal length parameter according to the input size (for example, the zoom multiple is 10), and then determines the distance between adjacent lenses according to the zoom multiple;
(3) after the distance is determined, the distance is fed back to the control module 131, the control module 131 sends a signal of "start driving", the driving module 132 drives the first adjusting motor 121 and the second adjusting motor 171 to start, the motors drive the lead screws to rotate, so that the inner movable lens barrel 14 and the outer movable lens barrel 16 are driven to move, the positions of corresponding structures are adjusted, the purpose of changing the distance between adjacent lenses is achieved, meanwhile, a first encoder 1211 and a second encoder 1711 which are arranged on the stepping motors convert the displacement generated by the rotation of the stepping motors into electric signals and transmit the electric signals to the control module 131, and the control module 131 determines the moving positions of the inner movable lens barrel 14 and the outer movable lens barrel 16, so that a control signal of "stop driving" is accurately sent to the driving module 132;
(4) the displacement measured by the first encoder 1211 and the second encoder 1711 is consistent with the adaptive distance of the driving module 132, the control module 131 sends a control signal of 'stopping driving', the driving module 132 stops driving, and the automatic adaptation of the eyepiece and the micro display screen is completed.
Second embodiment
As shown in fig. 6, the first adjustment mechanism 12 is also provided with a manual switch.
After the automatic adjustment operation of the first embodiment is completed, the main control eyepiece control unit 13 is closed, and the first adjustment mechanism 12 can be continuously and independently started in a manner of pressing the manual switch, so that the first adjustment mechanism 12 can continuously drive the inner movable lens barrel 14 or the outer movable lens barrel 16, and the inner movable lens barrel 14 and the outer movable lens barrel 16 in this state are separately driven, thereby realizing manual adjustment of corresponding structures, so as to complete fine adjustment operation during manual focusing.
Third embodiment
As shown in fig. 1, in combination with the structure disclosed in any of the above embodiments, the lens holder further includes an eyepiece cover 15, and the eyepiece cover 15 is fixed at one end of the lens holder 10 for human eye observation; the lens assembly 11 can be protected and buffered, and external light can be effectively shielded, so that light interference is avoided.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An automatic electrically adjusted microdisplay optical eyepiece, comprising: the micro-display screen adapter comprises a micro-lens frame (10), a lens assembly (11) fixed in the lens frame (10) and an outer movable lens barrel (16) sleeved at one end of the lens frame (10), wherein the lens assembly (11) comprises a fixed lens assembly and an adjustable lens assembly, and one end of the outer movable lens barrel (16) is used for fixing at least one size specification micro-display screen adapter seat;
the device also comprises a first adjusting mechanism (12) and a second adjusting mechanism (17), and the position of the outer movable lens barrel (16) can be adjusted back and forth through the second adjusting mechanism (17); the adjustable lens assembly comprises an inner movable lens barrel (14), a lens is fixed in the inner movable lens barrel (14), and the inner movable lens barrel (14) can be adjusted forwards and backwards through a first adjusting mechanism (12).
2. An automatically adjusting microdisplay optical eyepiece as recited in claim 1 wherein: one side of the inner movable lens barrel (14) is at least fixedly provided with a connecting rod (124), the connecting rod (124) penetrates through the lens frame (10) and is fixedly connected with a movable end and a movable sleeve (123), and the movable sleeve (123) is matched with the first adjusting mechanism (12) to realize the driving of the first adjusting mechanism (12) on the adjustable lens component.
3. An automatically adjusting microdisplay optical eyepiece as claimed in any of claim 2 in which: the first adjusting mechanism (12) comprises a first adjusting motor (121) and a first lead screw (122), and the first lead screw (122) is driven by the first adjusting motor (121); the second adjustment mechanism (17) includes a second adjustment motor (171) and a second lead screw (172), and the second lead screw (172) is driven by the second adjustment motor (171).
4. An automatically electrically adjusted microdisplay optical eyepiece as in claim 3 wherein: still include main control part eyepiece control unit (13), main control part eyepiece control unit (13) are adjusted through preset motor adjusting parameter first accommodate motor (121) with second accommodate motor (171), and main control part eyepiece control unit (13) set and are equipped with manual switch.
5. An electrically adjusted microdisplay optical eyepiece as in claim 3 wherein: the first adjusting motor (121) is provided with a first encoder (1211), the second adjusting motor (171) is provided with a second encoder (1711), and the first encoder (1211) and the second encoder (1711) respectively convert the rotary displacement formed by the driving of the first adjusting motor (121) and the second adjusting motor (171) into electric signals and are matched with the main control piece (13) so as to accurately control the moving amplitude of the adjustable inner movable lens barrel (14) and the adjustable outer movable lens barrel (16).
6. An electrically adjusted microdisplay optical eyepiece as in claim 5 wherein: the glasses lens frame also comprises an eyepiece cover (15), and the eyepiece cover (15) is fixed at one end of the lens frame (10) for observing human eyes.
7. An electrically adjusted microdisplay optical eyepiece as in claim 6 wherein: the main control (13) comprises a control module (131), a driving module (132) and an input module (133);
the control module (131) is used for receiving a feedback signal of the driving module (132), providing a control signal for the driving module (132), and simultaneously being directly matched with the first encoder (1211) and the second encoder (1711) for use;
the input module (133) is used for manually inputting the size and the observation size of the microdisplay;
the driving module (132) comprises a driving unit and a recording storage unit, wherein the driving unit directly drives the first adjusting motor (121) and the second adjusting motor (171), and the recording storage unit records adjusting parameters of the first adjusting motor (121) and the second adjusting motor (171) and forms automatic adaptation by combining the adjusting parameters with the size input by the input module (133).
8. A method of adjustment for use with an electrically adjustable microdisplay optical eyepiece as claimed in any of claims 1-7 comprising the steps of:
s1, embedding the micro display in the outer movable lens barrel (16), and then inputting the size and the observation size of the micro display through the input module (133);
s2, the driving module (132) determines corresponding focal length parameters according to the input size, and then determines the distance between adjacent lenses according to the zoom multiple;
s3, feeding back to a control module (131) after the distance is determined, wherein the control module (131) controls a driving module (132) to start, and the driving module (132) drives a first adjusting motor (121) and a second adjusting motor (171) to drive a first lead screw (122) and a second lead screw (172) to rotate, so as to drive an inner movable lens barrel (14) and an outer movable lens barrel (16) to move, so as to adjust the position of the corresponding structure, and meanwhile, a first encoder (1211) and a second encoder (1711) which are arranged on the first adjusting motor (121) and the second adjusting motor (171) convert the displacement generated by the rotation of the first adjusting motor (121) and the second adjusting motor (171) into electric signals and transmit the electric signals to the control module (131);
s4, when the displacement measured by the first encoder 1211 and the second encoder 1711 is consistent with the distance matched with the driving module 132, the control module 131 sends out a control signal of 'stopping driving', the driving module 132 stops driving, and the automatic matching of the eyepiece and the micro display screen is completed.
9. A method of adjusting an electrically adjustable microdisplay optical eyepiece as in claim 8 wherein: in the step S2, the focal length parameters at least include a distance x between the adjustable lens assembly b and the fixed lens assembly a, and a distance between the lens d and the microdisplay; and obtaining a zoom multiple according to the matching of the two distances.
10. A method of adjusting an electrically adjustable microdisplay optical eyepiece as in claim 9 wherein:
the relation formula of the zoom factors and the inner movable lens cone and the outer movable lens cone using the lens combination is as follows:
the zoom factor R is calculated by the formula:
R＝9.79356-0.0874x
the distance between the lens d and the microdisplay is calculated by the formula:
y＝28.1679+0.0878398+0.000662338x2。
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113376825A (en) * | 2021-06-15 | 2021-09-10 | 河南平原光电有限公司 | Variable-focus ocular lens visual field monitoring optical system |
| WO2023201875A1 (en) * | 2022-04-22 | 2023-10-26 | 歌尔光学科技有限公司 | Projection lens, projection optical machine and virtual reality device |
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