Rapid alignment of the sample arm adjustment mechanism of the axial length measuring instrument

Abstract

The present invention discloses a sample arm adjustment mechanism of a fast-aligned eye axis length measuring instrument, comprising a collimator, a sample arm optical fiber adapter, a plane mirror and a thermal mirror. The sample arm optical fiber adapter is equipped with an optical fiber adapter adjustment device that drives the optical fiber adapter to tilt and rotate. The collimator lens barrel is equipped with a collimator lens adjustment device that drives the optical fiber to move left and right in a collimator lens installation channel. The plane mirror adapter shaft is equipped with a lens rotation mechanism that drives the optical fiber to rotate in the collimator lens installation channel. The positions of the collimator and the optical fiber are adjusted respectively so that the light is focused at the position we need. The position of the light shining on the eye is constantly changed by rotating the tilted plane mirror, thereby changing the position of the light on the eye and reducing the alignment time.

Description

Technical Field

[0001] The invention relates to a sample arm adjustment mechanism of a fast-aligned eye axis length measuring instrument, belonging to the field of ophthalmic equipment. Background Art

[0002] The ophthalmic axial length measuring instrument is used by the hospital ophthalmology department to measure the axial length, corneal curvature and anterior chamber depth of the patient's eyes, as well as the human corneal diameter (white to white, WTW) and calculate the degree of the required intraocular lens to be implanted in the eye.

[0003] The optical path system of the sample arm of the biometer is as follows Figure 1 As shown, it includes optical fiber, collimating mirror, plane mirror and thermal mirror. Currently, during alignment, the interference signal is found through the entire optical measuring instrument head, which takes a long time. Summary of the invention

[0004] In view of the above technical problems, the purpose of the present invention is to provide a sample arm adjustment mechanism for an axial length measuring instrument for rapid alignment, which reduces the alignment time by rotating the tilted plane mirror and changing the position of the light on the eye.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is: a sample arm adjustment mechanism of a fast-aligned axial length measuring instrument, comprising a collimator, a sample arm fiber optic adapter, a plane mirror and a thermal mirror, characterized in that: it also includes a collimator mounting seat, the right side surface of the collimator mounting seat is an inclined surface, a collimator mounting channel extending left and right is arranged in the collimator mounting seat, a light source through hole communicating with the collimator mounting channel is arranged on the left side surface of the collimator mounting seat, the thermal mirror is obliquely installed on the right side surface of the collimator mounting seat, and a thermal mirror through hole is arranged on the right side surface, a light through hole for the thermal mirror reflected light to pass through is arranged on the front side surface of the collimator mounting seat, the sample arm fiber optic adapter is installed on the left side surface of the collimator mounting seat, and the sample arm fiber optic adapter is equipped with a fiber optic adapter for driving its tilting and rotation. The collimator is installed in a collimator barrel, and the collimator barrel is installed in a collimator installation channel. The collimator barrel is equipped with a collimator adjustment device that can drive it to move left and right in the collimator installation channel to adjust its position. A plane mirror adapter shaft with an axis extending left and right is installed in the collimator installation channel on the right side of the collimator barrel. A center hole for light to pass through is arranged at the center of the plane mirror adapter shaft. A groove communicating with the center hole for installing the plane mirror is arranged on the left side of the plane mirror adapter shaft. The bottom of the groove is inclined so that the plane mirror is inclined. The plane mirror adapter shaft is equipped with a lens rotating mechanism that can drive it to rotate in the collimator installation channel. The light transmitted by the optical fiber in the sample arm optical fiber adapter passes through the collimator to the plane mirror and then to the hot mirror, and is reflected by the hot mirror and then emitted from the light hole.

[0006] The position of the optical fiber is changed by the optical fiber adapter adjustment device, and the light is focused at the position we need with the collimator adjustment device. After adjusting the position, the optical fiber adapter and the collimator are fixed. By allowing the tilted plane mirror to rotate continuously in the optical path, the light shining on the eye changes continuously, and changing the position of the light on the eye reduces the alignment time.

[0007] In the above scheme: the fiber optic adapter adjustment device includes an adjustment spring piece, a fiber optic adapter mounting seat and an adjustment bolt, the adjustment spring piece is provided with a through hole, an adjustment sheet metal is formed in the through hole, the lower side of the adjustment sheet metal is connected to the adjustment spring piece and the adjustment sheet metal can rotate around its connection point, and there are gaps between the upper side and the front and rear sides and the through hole walls of the adjustment spring piece respectively, the adjustment spring piece and the adjustment sheet metal are jointly formed with a center hole corresponding to the light through hole of the light source, and a yield sink is provided on the left side of the collimator mounting seat at a position corresponding to the adjustment sheet metal, the sample arm fiber optic adapter is installed in the center hole of the fiber optic adapter mounting seat, and the fiber optic adapter mounting seat is installed on the adjustment sheet metal by bolts, and the upper and lower sides of the fiber optic adapter mounting seat are respectively provided with mounting ears, and the mounting ears are provided with adjustment bolt holes, and the adjusting bolts pass through the adjustment bolt holes on the mounting ears and then abut against the upper and lower sides of the adjustment spring piece, and the adjusting bolts are moved up and down to drive the adjustment sheet metal to rotate, thereby adjusting the inclination angle of the sample arm fiber optic adapter. By moving the adjusting bolt, the adjusting sheet metal is driven to rotate around its connection, thereby changing the inclination angle of the optical fiber and changing the position of the optical fiber. The adjusting bolt and the adjusting sheet metal are coordinated for adjustment, and the adjustment range is controllable and has strong adaptability.

[0008] In the above solution: the optical fiber adapter mounting seat is mounted on the adjustment sheet metal through bolts located at the front and rear sides, and a recessed platform is also provided on the collimator mounting seat corresponding to the bolts, so as to facilitate installation.

[0009] In the above scheme: the collimator adjustment device includes a strip hole extending left and right on the upper side of the collimator mounting seat and communicating with the collimator mounting channel, a locking bolt is arranged in the strip hole and connected to the collimator barrel, and the locking bolt is locked by a locking nut to fix the position of the collimator barrel. The position of the collimator barrel is adjusted by the strip hole and the locking bolt, and the structure is simple and the design is reasonable. And the range of movement is limited by the length of the strip hole, which is convenient for adjustment.

[0010] In the above scheme: the lens rotation mechanism includes a driven gear sleeved outside the plane mirror adapter shaft and a driving gear located outside the collimator lens mounting seat, the driving gear portion extends into the collimator lens mounting channel and meshes with the driven gear, and the driving gear is driven to rotate by a DC reduction motor.

[0011] In the above scheme: the lens rotation mechanism also includes a motor seat, the motor seat is a "7" shaped seat, the DC reduction motor is mounted on the upper horizontal plate of the motor seat, the motor seat is fixed on the collimator mirror mounting seat through its upper horizontal plate, the vertical plate of the motor seat is provided with a center hole, the upper side of the collimator mirror mounting seat is provided with a square hole for the vertical plate to be inserted into the collimator mirror mounting channel, and the plane mirror adapter shaft is installed in the center hole of the vertical plate through a bearing. The tilting lens is driven to rotate in the optical path through gear transmission, and under the action of the bearing, the transmission is stable and the vibration noise is small.

[0012] In the above scheme: the side of the plane mirror adapter shaft close to the collimator lens barrel extends out of the central hole of the vertical plate, and the driven gear is sleeved on the extended end.

[0013] The present invention has the following beneficial effects: the present invention sets an independent collimator adjustment device and an optical fiber adapter adjustment device to adjust the positions of the collimator and the optical fiber respectively, so that the light is focused at the position we need. The tilted plane mirror is rotated continuously in the optical path, so that the position of the light shining on the eye is constantly changed, thereby changing the position of the light on the eye, reducing the alignment time, and the whole device is reliable in operation, convenient in alignment, convenient in adjustment, and has low vibration and noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the optical path diagram of the present invention.

[0015] Figure 2 It is a schematic diagram of the structure of the present invention.

[0016] Figure 3 for Figure 2 Top view of the .

[0017] Figure 4 for Figure 3 Middle AA section view.

[0018] Figure 5 for Figure 2 Left side view.

[0019] Figure 6 This is the BB cross-sectional view.

[0020] Figure 7 An exploded diagram. DETAILED DESCRIPTION

[0021] The present invention will be further described below by way of embodiments and in conjunction with the accompanying drawings:

[0022] Example 1

[0023] The top, bottom, left, right, back, front, etc. of the present invention only represent the orientation in the figure and do not represent the absolute position of the product.

[0024] like Figure 1-7 As shown in the figure, the sample arm adjustment mechanism of the eye axis length measuring instrument with rapid alignment, the optical lens includes a collimator 1, a sample arm optical fiber adapter 2, a plane mirror 3 and a thermal mirror 4. The optical path diagram is as follows Figure 1 shown.

[0025] The sample arm adjustment mechanism is composed of a collimator lens mounting seat 5, a fiber optic adapter adjustment device, a collimator lens barrel 6, a collimator lens adjustment device, and a lens rotating mechanism.

[0026] The right side of the collimator mirror mounting seat 5 is an inclined surface. As shown in the figure, the rear side of the left and right sides of the collimator mirror mounting seat 5 is inclined, which is equivalent to the left and right extension length of the rear side being less than the left and right extension length of the front side. A collimator mirror mounting channel extending left and right is provided in the collimator mirror mounting seat 5. A light source through hole 501 communicating with the collimator mirror mounting channel is provided on the left side of the collimator mirror mounting seat 5. The heat mirror 4 is obliquely mounted on the right side of the collimator mirror mounting seat 5, and a heat mirror through hole 502 is provided on the right side. A light through hole 503 for the reflected light of the heat mirror to pass through is provided on the front side of the collimator mirror mounting seat 5. Both the through hole 503 and the heat mirror through hole 502 are communicated with the collimator mirror mounting channel.

[0027] The sample arm optical fiber adapter 2 is installed on the left side surface of the collimator mirror mounting seat 5. The sample arm optical fiber adapter 2 is equipped with an optical fiber adapter adjustment device for driving the optical fiber adapter to tilt and rotate.

[0028] The optical fiber adapter adjustment device includes an adjustment spring piece 7, an optical fiber adapter mounting seat 8 and an adjustment bolt 9. A through hole is provided on the adjustment spring piece 7, and an adjustment sheet metal 701 is formed in the through hole. The lower side of the adjustment sheet metal 701 is connected to the adjustment spring piece 7 as a whole and the adjustment sheet metal 701 can rotate around its connection point. There are gaps between the upper side and the front and rear sides of the adjustment sheet metal 701 and the through hole wall of the adjustment spring piece 7, that is, the adjustment sheet metal 701 can rotate left and right around its lower side. The adjustment sheet metal 701 and the adjustment spring piece 7 are integrally formed by stamping. The adjustment spring piece 7 and the adjustment sheet metal 701 are jointly formed with a center hole corresponding to the light source through hole 501. The center hole of the adjustment spring piece 7 is coaxial with the center hole of the optical fiber adapter mounting seat 8 and the light source through hole 501, that is, the center hole is partially on the lower side of the adjustment sheet metal 701, and partially on the adjustment spring piece 7. Figure 7As shown. A yielding platform is provided on the left side of the collimator mount 5 at the position corresponding to the adjustment sheet metal 701 to provide a yielding space for the rotation of the adjustment sheet metal 701 to avoid interference. The sample arm fiber optic adapter 2 is installed in the center hole of the fiber optic adapter mount 8, and the fiber optic adapter 8 mount is installed on the adjustment sheet metal 701 by bolts. Preferably, the fiber optic adapter mount 8 is installed on the adjustment sheet metal 701 by bolts located on the front and rear sides, and a yielding platform is also provided on the collimator mount 5 corresponding to the bolt to facilitate the installation of the bolt. Mounting lugs 801 are provided on the upper and lower sides of the fiber optic adapter mount 8, respectively, and adjustment bolt holes are provided on the mounting lugs 801. The adjustment bolts 9 pass through the adjustment bolt holes on the mounting lugs 801 and abut against the upper and lower sides of the adjustment springs. The adjustment bolts 9 move up and down to drive the adjustment sheet metal 701 to rotate left and right, thereby adjusting the inclination angle of the sample arm fiber optic adapter 2.

[0029] The collimator 1 is installed in the collimator barrel 6, the collimator barrel 6 is coaxial with the collimator installation passage, the collimator barrel 6 is installed in the collimator installation passage, and the collimator barrel 6 is equipped with a collimator adjustment device that can drive the collimator to move left and right in the collimator installation passage. The collimator adjustment device includes a strip hole 504 that is arranged on the upper side of the collimator mounting seat 5 and extends left and right and communicates with the collimator installation passage, and the strip hole 504 is located at the position of the upper side close to the left, and the length of the strip hole 504 determines the adjustment stroke of the collimator. A locking bolt is provided in the strip hole 504 and is connected to the collimator barrel 6. As shown in the figure, a bolt hole 601 is provided on the collimator barrel and is connected to the locking bolt. The locking bolt is locked by a locking nut to fix the position of the collimator barrel 6 (the locking bolt is not drawn in the figure).

[0030] A plane mirror adapter shaft 10 with an axis extending left and right is installed in the collimator mirror installation channel on the right side of the collimator mirror barrel 6. A center hole for light to pass through is set in the center of the plane mirror adapter shaft 10. A groove for installing the plane mirror is set on the left side of the plane mirror adapter shaft 10. The groove is connected to the center hole, and the diameter of the groove is larger than the aperture of the center hole. The bottom of the groove is tilted so that the plane mirror 3 can be installed tilted. The plane mirror adapter shaft 10 is equipped with a lens rotating mechanism that can drive it to rotate in the collimator mirror installation channel. The light transmitted by the optical fiber in the sample arm optical fiber adapter 2 is focused by the collimator 1 to the plane mirror 3 and then to the hot mirror 4. It is reflected by the hot mirror 4 and then emitted from the light hole 503.

[0031] The lens rotating mechanism includes a driven gear 11 sleeved on the plane mirror adapter shaft 10 and a driving gear 12 located outside the collimator lens mounting seat. The driving gear 12 partially extends into the collimator lens mounting channel and meshes with the driven gear 11. The driving gear 12 is driven to rotate by a DC reduction motor 13.

[0032] The DC reduction motor 13 is mounted on the motor seat 14, which is a "7"-shaped seat. The DC reduction motor 13 is mounted on the upper transverse plate of the motor seat 14. The motor seat 14 is fixed to the upper side of the collimator mirror mounting seat 5 through its upper transverse plate. A center hole is provided on the vertical plate of the motor seat 14. The center hole of the vertical plate is coaxial with the plane mirror adapter shaft 10 and the collimator mirror mounting channel. A square hole 505 is provided on the upper side of the collimator mirror mounting seat 5 for the vertical plate to be inserted into the collimator mirror mounting channel. The square hole 505 is connected to the collimator mirror mounting channel, and the strip hole 504 is located on the left side of the square hole 505. The plane mirror adapter shaft 10 is installed in the center hole of the vertical plate through a bearing. The side of the plane mirror adapter shaft 10 close to the collimator mirror barrel 6 extends outside the center hole of the vertical plate, and the driven gear 11 is sleeved on the protruding end.

[0033] The present invention is not limited to the above-mentioned embodiments. Those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A fast-aligned eye axis length measuring instrument sample arm adjustment mechanism, comprising a collimator, a sample arm fiber adapter, a plane mirror and a thermal mirror, characterized in that: It also includes a collimator mirror mounting seat, the right side surface of the collimator mirror mounting seat is an inclined surface, a collimator mirror mounting channel extending left and right is arranged in the collimator mirror mounting seat, a light source light hole communicating with the collimator mirror mounting channel is arranged on the left side surface of the collimator mirror mounting seat, the heat mirror is obliquely mounted on the right side surface of the collimator mirror mounting seat, and a heat mirror light hole is arranged on the right side surface, a light hole for the heat mirror reflected light to pass out is arranged on the front side surface of the collimator mirror mounting seat, the sample arm fiber optic adapter is installed on the left side surface of the collimator mirror mounting seat, the sample arm fiber optic adapter is equipped with a fiber optic adapter adjustment device that drives it to tilt and rotate, the collimator mirror is installed in the collimator mirror barrel, and the collimator mirror barrel is installed on the collimator mirror. The collimator lens barrel is provided with a collimator lens adjustment device capable of driving the collimator lens to move left and right in the collimator lens installation channel to adjust the position; a plane mirror adapter shaft with an axis extending left and right is installed in the collimator lens installation channel on the right side of the collimator lens barrel; a center hole for light to pass through is provided at the center of the plane mirror adapter shaft; a groove communicating with the center hole for installing the plane mirror is provided on the left side of the plane mirror adapter shaft; the bottom of the groove is tilted so that the plane mirror is tilted; the plane mirror adapter shaft is provided with a lens rotating mechanism capable of driving the plane mirror to rotate in the collimator lens installation channel; the light transmitted by the optical fiber in the sample arm optical fiber adapter passes through the collimator lens to the plane mirror and then to the hot mirror, and is reflected by the hot mirror from the light through hole The fiber optic adapter adjustment device comprises an adjustment spring piece, a fiber optic adapter mounting seat and an adjustment bolt. The adjustment spring piece is provided with a through hole, and an adjustment sheet metal is formed in the through hole. The lower side of the adjustment sheet metal is connected to the adjustment spring piece as a whole, and the adjustment sheet metal can rotate around its connection point. There are gaps between the upper side and the front and rear sides and the through hole wall of the adjustment spring piece respectively. The adjustment spring piece and the adjustment sheet metal are jointly formed with a center hole corresponding to the light source through hole. A yield sink is provided on the left side of the collimator mounting seat at a position corresponding to the adjustment sheet metal. The sample arm fiber optic adapter is installed in the center hole of the fiber optic adapter mounting seat. The fiber optic adapter mounting seat is installed on the adjustment sheet metal by bolts. The upper and lower sides of the adapter mounting seat are respectively provided with mounting ears, and the mounting ears are provided with adjustment bolt holes. The adjustment bolts pass through the adjustment bolt holes on the mounting ears and abut against the upper and lower sides of the adjustment springs. The adjustment bolts move up and down to drive the adjustment sheet metal to rotate, thereby adjusting the inclination angle of the sample arm fiber optic adapter; the lens rotation mechanism includes a driven gear sleeved on the outside of the plane mirror adapter shaft and a driving gear located on the outside of the collimator lens mounting seat, the driving gear part extends into the collimator lens mounting channel and meshes with the driven gear, and the driving gear is driven to rotate by a DC reduction motor; the side of the plane mirror adapter shaft close to the collimator lens barrel extends to the outside of the central hole of the vertical plate, and the driven gear is sleeved on the protruding end.

2. According to the rapid alignment eye axis length measuring instrument sample arm adjustment mechanism of claim 1, it is characterized by: The optical fiber adapter mounting seat is mounted on the adjusting sheet metal via bolts located at the front and rear sides, and a yielding sink is also provided on the collimator mounting seat corresponding to the bolts.

3. The sample arm adjustment mechanism of the rapid alignment eye axis length measuring instrument according to claim 1 or 2, characterized in that: The collimator adjustment device includes a strip hole extending left and right on the upper side of the collimator mounting seat and communicating with the collimator mounting channel. A locking bolt connected to the collimator barrel is arranged in the strip hole, and the locking bolt is locked by a locking nut to fix the position of the collimator barrel.

4. The sample arm adjustment mechanism of the rapid alignment eye axis length measuring instrument according to claim 3 is characterized by: The lens rotation mechanism also includes a motor seat, which is a "7"-shaped seat. The DC reduction motor is installed on the upper horizontal plate of the motor seat through an upwardly extending mounting lug. The motor seat is fixed to the collimator mirror mounting seat through its upper horizontal plate. A center hole is provided on the vertical plate of the motor seat. A square hole is provided on the upper side of the collimator mirror mounting seat for inserting the vertical plate into the collimator mirror mounting channel. The plane mirror adapter shaft is installed in the center hole of the vertical plate through a bearing.

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