A common-path off-axis digital holographic microscopy device with adjustable shear amount

Abstract

The present invention relates to a digital holographic microscopy device, and particularly to a common-path off-axis digital holographic microscopy device with adjustable shear amount. The present invention provides a common-path off-axis digital holographic microscopy device with adjustable shear amount that can realize the common path of the object beam and the reference beam and can effectively compensate for environmental interference on the two interfering beams. A common-path off-axis digital holographic microscopy device with adjustable shear amount includes a first fixing frame, a semiconductor laser light source, a beam expander and collimator, etc. The upper part of the first fixing frame is connected with the semiconductor laser light source, and the upper part of the first fixing frame is connected with the beam expander and collimator. The light source emitted by the semiconductor laser light source can pass through the beam expander and collimator, and the beam expander and collimator diffuses the light source into two light sources, and people can adjust the refraction angle of the two light sources by manually adjusting the position of the isosceles triangular prism. In this way, the common path of the object beam and the reference beam can be realized, and environmental interference on the two interfering beams can be effectively compensated.

Description

Technical Field

[0001] The present invention relates to a digital holographic microscope device, and particularly to a common-path off-axis digital holographic microscope device with adjustable shear amount. Background Art

[0002] At present, digital holographic microscope devices can be mainly divided into coaxial common-path interference systems and non-common-path off-axis interference systems. However, in an independent coaxial common-path interference system, image overlap easily occurs, and in a non-common-path off-axis interference system, it is easily affected by any mechanical vibration or air disturbance, thus affecting the two separated interference beams. Existing digital holographic microscope devices include a first fixing frame, a semiconductor laser light source, a microscope objective lens, a first lens, a first mirror, a second lens, a second mirror, a filter, a third lens, and an imaging detector. This device cannot achieve a common path for the object beam and the reference beam and cannot avoid being affected by any mechanical vibration or air interference.

[0003] Therefore, there is provided a common-path off-axis digital holographic microscope device with adjustable shear amount that can achieve a common path for the object beam and the reference beam and can effectively compensate for environmental interference on the two interference beams. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides a common-path off-axis digital holographic microscope device with adjustable shear amount that can achieve a common path for the object beam and the reference beam and can effectively compensate for environmental interference on the two interference beams, so as to overcome the shortcomings that the existing device cannot achieve a common path for the object beam and the reference beam and cannot avoid being affected by any mechanical vibration or air interference.

[0005] To achieve the above object, the present invention is realized by the following solutions: A common-path off-axis digital holographic microscopy device with adjustable shear amount, comprising a first fixing frame, a semiconductor laser light source, a beam expander collimator, a microscopic objective lens, a dust-proof cylinder, a first lens, a first mirror, a second lens, a second mirror, an isosceles triangular prism, a filter, a third lens, an imaging detector, a placement mechanism, a shock-proof mechanism and a positioning mechanism. The upper part of the first fixing frame is connected with the semiconductor laser light source, the upper part of the first fixing frame is connected with the beam expander collimator, the middle part of the first fixing frame is connected with the microscopic objective lens, a dust-proof cylinder for isolating dust is arranged below the first fixing frame, the lower side of the middle part of the first fixing frame is connected with the first lens, the lower side of the middle part of the first fixing frame is connected with the first mirror, the front lower side of the first fixing frame is connected with the second lens, the front lower side of the first fixing frame is connected with the second mirror, the isosceles triangular prism is slidably connected to the front lower side of the first fixing frame, the filter is slidably connected to the front side of the first fixing frame, the third lens is connected to the front side of the first fixing frame, the imaging detector is connected to the middle part of the first fixing frame, and the imaging detector is electrically connected to the microscopic objective lens at the rear side. A placement mechanism for placing the object to be observed is arranged at the upper part of the first fixing frame. A shock-proof mechanism for avoiding the influence of jitter on imaging is connected between the components of the placement mechanism and the first fixing frame. A positioning mechanism for positioning the object to be observed is connected between the components of the placement mechanism and the first fixing frame.

[0006] Optionally, the placement mechanism includes a contact switch, a sliding placement rack, a first reduction motor and a lead screw. The contact switch is arranged at the upper rear side of the first fixing frame. The sliding placement rack for placing the object to be observed is slidably connected to the upper part of the first fixing frame. The first reduction motor is connected to the upper left side of the first fixing frame. The lead screw is rotatably connected to the upper part of the first fixing frame. The output shaft of the first reduction motor is connected to the left side of the lead screw. The right side of the lead screw is threadedly connected to the upper right side of the sliding placement rack.

[0007] Optionally, the shock-proof mechanism includes a first rotating shaft, a spur gear, a first rubber clamp, a block and a rack. The first rotating shaft is rotatably connected to the upper right part of the first fixing frame. The spur gears are symmetrically connected to the front and rear of the first rotating shaft. The racks are connected to the front and rear sides of the right side of the sliding placement rack. After the rack moves leftward, it will mesh with the spur gear. The first rubber clamps for limiting the sliding placement rack are symmetrically arranged at the front and rear of the top of the first rotating shaft. A block for assisting the first rubber clamp to limit the sliding placement rack is connected to the right side of the sliding placement rack.

[0008] Optionally, the positioning mechanism includes a fixing rod, a first sliding rod, a first spring and a second rubber clamp. The fixing rods are symmetrically connected to the front and rear of the left and right sides of the lower side of the sliding placement rack. The first sliding rods are slidably connected to the four fixing rods. The first springs are connected between the outer sides of the four fixing rods and the first sliding rods on the same side. The second rubber clamps for positioning the object to be observed are connected between the inner sides of the two first sliding rods on the same side horizontally.

[0009] Optionally, it further includes an auxiliary mechanism for assisting the first sliding rod to move by itself. The auxiliary mechanism includes a fixed seat, a second sliding rod, a second spring, and a top block. Two fixed seats are connected to the right side of the sliding placement frame. The second sliding rods are slidably connected inside the two fixed seats. Second springs are connected between the upper parts of the two second sliding rods and the tops of the fixed seats on the same side. The lower sides of the two second sliding rods are both connected with top blocks for driving the first sliding rod to move.

[0010] Optionally, it further includes a dust-proof mechanism for blocking dust. The dust-proof mechanism includes a first distance sensor, a second fixing frame, a second reduction motor, a second rotating shaft, a dust-proof rolling cloth, a third sliding rod, a guiding rod, a fourth spring, and a fifth spring. The first distance sensor is arranged on the upper right side of the sliding placement frame. The second fixing frame is connected to the front side of the top of the first fixing frame. The second reduction motor is connected to the left side of the first fixing frame. The second rotating shaft is rotatably connected to the middle of the first fixing frame. The left side of the second rotating shaft is connected to the output shaft of the second reduction motor. The dust-proof rolling cloth for blocking dust is arranged on the second rotating shaft. The third sliding rod is slidably connected to the front side of the first fixing frame. The third sliding rod is connected to the lower side of the dust-proof rolling cloth. The left and right sides of the third sliding rod are both slidably connected with guiding rods. The upper sides of the two guiding rods are both slidably connected to the second fixing frame. The fourth springs are connected between the lower sides of the two guiding rods and the third sliding rod. The fifth springs are connected between the upper sides of the two guiding rods and the upper rear side inside the second fixing frame.

[0011] Optionally, it further includes a moisture-proof mechanism for removing moisture. The moisture-proof mechanism includes a second distance sensor, a first electric push rod, and a constant temperature electric heating sheet. The second distance sensor is arranged on the upper left side of the second fixing frame. The first electric push rods are connected to the left and right sides of the lower side of the first fixing frame. The telescopic rods of the two first electric push rods are both slidably connected to the first fixing frame. The constant temperature electric heating sheet is connected between the tops of the telescopic rods of the two first electric push rods. The constant temperature electric heating sheet is slidably connected to the dust-proof cylinder.

[0012] Optionally, it further includes an anti-shake mechanism for stabilizing the common-path off-axis digital holographic microscopy device with adjustable shear amount. The anti-shake mechanism includes a temperature sensor, a second electric push rod, an elastic component, and a suction cup. The temperature sensor is arranged on the lower left side of the dust-proof cylinder. Two second electric push rods are connected to the left and right sides of the lower side of the first fixing frame. Elastic components are arranged at the bottoms of the telescopic rods of the four second electric push rods. Suction cups for adsorbing the ground are arranged at the bottoms of the four elastic components.

[0013] Optionally, it further includes a control box. The middle part at the rear side of the first fixing frame is connected with the control box. The control box includes a storage battery, a power module and a control module. The storage battery powers the entire common-path off-axis digital holographic microscopy device with adjustable shear amount. The output end of the storage battery is electrically connected to the power module. A main power switch is connected to the power module through a circuit. The power module is electrically connected to the control module. A DS1302 clock circuit and a 24C02 circuit are connected to the control module. The first distance sensor, the second distance sensor, the temperature sensor and the contact switch are all electrically connected to the control module. The first reduction motor and the second reduction motor are both connected to the control module through a DC motor forward and reverse module. The first electric push rod, the second electric push rod and the constant temperature electric heating sheet are all connected to the control module through a relay control module.

[0014] The present invention has the following advantages: 1. The light source emitted by the semiconductor laser light source can pass through the beam expander and collimator. The beam expander and collimator diffuses the light source into two light sources, and people can manually adjust the position of the isosceles triangular prism to adjust the refraction angle of the two light sources. In this way, the object beam and the reference beam can share the same optical path, which can effectively compensate for the environmental interference on the two interfering beams.

[0015] 2. In the present invention, the second sliding rod drives the top block to move downward, so that the top block drives the first sliding rod to move inward. In this way, it is not necessary for people to manually control the sliding of the first sliding rod, reducing the trouble of people's operation.

[0016] 3. In the present invention, the second rotating shaft winds and unwinds the dust-proof cloth. With the cooperation of the fifth spring, the dust-proof cloth can prevent dust from falling on components such as the second lens, the second mirror, the isosceles triangular prism, the filter, the third lens and the imaging detector, thereby preventing dust from affecting the imaging result. The constant temperature electric heating sheet heats the dust-proof cylinder. In this way, it can avoid moisture inside the dust-proof cylinder due to humid weather, which may affect the imaging result of the object.

[0017] 4. In the present invention, the suction cup contacts the ground, so that the suction cup adsorbs the ground. In this way, it can be avoided that the object is affected by any mechanical vibration or air disturbance during imaging, preventing different effects on the two separated light beams. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a first perspective three-dimensional structure schematic diagram of the present invention.

[0019] Figure 2 It is a second perspective three-dimensional structure schematic diagram of the present invention.

[0020] Figure 3 It is a third perspective three-dimensional structure schematic diagram of the present invention.

[0021] Figure 4This is the first partial three-dimensional structure diagram of the present invention.

[0022] Figure 5 This is the second partial three-dimensional structure diagram of the present invention.

[0023] Figure 6 This is the third partial three-dimensional structure diagram of the present invention.

[0024] Figure 7 This is the partial three-dimensional structure diagram of the placement mechanism of the present invention.

[0025] Figure 8 This is the three-dimensional structure diagram of the placement mechanism of the present invention.

[0026] Figure 9 This is the first three-dimensional structure diagram of the shock-proof mechanism of the present invention.

[0027] Figure 10 This is the second three-dimensional structure diagram of the shock-proof mechanism of the present invention.

[0028] Figure 11 This is the three-dimensional structure diagram of the positioning mechanism of the present invention.

[0029] Figure 12 This is the three-dimensional structure diagram of the auxiliary mechanism of the present invention.

[0030] Figure 13 This is the first partial three-dimensional structure diagram of the dust-proof mechanism of the present invention.

[0031] Figure 14 This is the second partial three-dimensional structure diagram of the dust-proof mechanism of the present invention.

[0032] Figure 15 This is the third partial three-dimensional structure diagram of the dust-proof mechanism of the present invention.

[0033] Figure 16 This is the fourth partial three-dimensional structure diagram of the dust-proof mechanism of the present invention.

[0034] Figure 17 This is the fifth partial three-dimensional structure diagram of the dust-proof mechanism of the present invention.

[0035] Figure 18 This is the first partial three-dimensional structure diagram of the moisture-proof mechanism of the present invention.

[0036] Figure 19 This is the second partial three-dimensional structure diagram of the moisture-proof mechanism of the present invention.

[0037] Figure 20 This is the three-dimensional structure diagram of the anti-shake mechanism of the present invention.

[0038] Figure 21This is the circuit block diagram of the present invention.

[0039] Figure 22 This is the circuit schematic diagram of the present invention.

[0040] Description of reference numerals in the drawings: 1: First fixing frame, 2: Semiconductor laser light source, 3: Beam expander and collimator, 4: Microscope objective lens, 5: Dust-proof cylinder, 6: First lens, 7: First mirror, 8: Second lens, 9: Second mirror, 10: Isosceles triangular prism, 11: Filter, 12: Third lens, 13: Imaging detector, 14: Placing mechanism, 141: Control box, 142: Contact switch, 143: Sliding placing rack, 144: First reduction motor, 145: Lead screw, 15: Shock-proof mechanism, 151: First rotating shaft, 152: Straight gear, 153: First rubber clamp, 154: Block, 155: Rack, 16: Positioning mechanism, 161: Fixed rod, 162: First sliding rod, 163: First spring, 164: Second rubber clamp, 17: Auxiliary mechanism, 171: Fixed seat, 172: Second sliding rod, 173: Second spring, 174: Top block, 18: Dust-proof mechanism, 181: First distance sensor, 182: Second fixing frame, 183: Second reduction motor, 184: Second rotating shaft, 185: Dust-proof cloth roll, 186: Third sliding rod, 187: Guide rod, 188: Fourth spring, 189: Fifth spring, 19: Moisture-proof mechanism, 191: Second distance sensor, 192: First electric push rod, 193: Constant temperature electric heating sheet, 20: Anti-shake mechanism, 201: Temperature sensor, 202: Second electric push rod, 203: Elastic component, 204: Suction cup. Detailed implementation manners

[0041] Next, in combination with the drawings and specific implementation manners, the present invention will be further described:

[0042] Embodiment 1

[0043] Please refer to Figures 1 - 6, A common-path off-axis digital holographic microscopy device with adjustable shear amount, comprising a first fixing frame 1, a semiconductor laser light source 2, a beam expander collimator 3, a microscopic objective lens 4, a dust-proof cylinder 5, a first lens 6, a first mirror 7, a second lens 8, a second mirror 9, an isosceles triangular prism 10, a filter 11, a third lens 12, an imaging detector 13, a placement mechanism 14, a shock-proof mechanism 15 and a positioning mechanism 16. The upper part of the first fixing frame 1 is fixedly connected with the semiconductor laser light source 2 by bolts. The upper part of the first fixing frame 1 is fixedly connected with the beam expander collimator 3 by bolts. The beam expander collimator 3 is located below the semiconductor laser light source 2. The middle part of the first fixing frame 1 is fixedly connected with the microscopic objective lens 4 by bolts. A dust-proof cylinder 5 is arranged below the first fixing frame 1. The lower side of the middle part of the first fixing frame 1 is fixedly connected with the first lens 6 by bolts. The lower side of the middle part of the first fixing frame 1 is fixedly connected with the first mirror 7 by bolts. The first mirror 7 is located below the first lens 6. The front lower side of the first fixing frame 1 is fixedly connected with the second lens 8 by bolts. The front lower side of the first fixing frame 1 is fixedly connected with the second mirror 9 by bolts. The front lower side of the first fixing frame 1 is slidably connected with the isosceles triangular prism 10. The isosceles triangular prism 10 is located between the second lens 8 and the second mirror 9. The front side of the first fixing frame 1 is slidably connected with the filter 11. The filter 11 is located above the isosceles triangular prism 10. The front side of the first fixing frame 1 is fixedly connected with the third lens 12 by bolts. The third lens 12 is located behind the filter 11. The middle part of the first fixing frame 1 is fixedly connected with the imaging detector 13 by bolts. A wire connection is provided between the rear side of the imaging detector 13 and the microscopic objective lens 4. A placement mechanism 14 is arranged on the upper part of the first fixing frame 1. A shock-proof mechanism 15 is connected between the components of the placement mechanism 14 and the first fixing frame 1. A positioning mechanism 16 is connected between the components of the placement mechanism 14 and the first fixing frame 1.

[0044] Please refer to Figures 7 - 8 , The placement mechanism 14 includes a contact switch 142, a sliding placement rack 143, a first reduction motor 144 and a lead screw 145. The contact switch 142 is arranged on the upper rear side of the first fixing frame 1. The upper part of the first fixing frame 1 is slidably connected with the sliding placement rack 143. The first reduction motor 144 is fixedly connected to the upper left side of the first fixing frame 1 by bolts. The upper part of the first fixing frame 1 is rotatably connected with the lead screw 145. The output shaft of the first reduction motor 144 is connected to the left side of the lead screw 145 by a coupling. The right side of the lead screw 145 is threadedly connected to the upper right side of the sliding placement rack 143.

[0045] Please refer to Figures 9 - 10, the shockproof mechanism 15 includes a first rotating shaft 151, a spur gear 152, a first rubber fixture 153, a clamping block 154 and a rack 155. The upper right part of the first fixing frame 1 is connected to the first rotating shaft 151 through a bearing. The spur gears 152 are symmetrically connected to the front and rear of the first rotating shaft 151 through keys. The racks 155 are fixedly connected to the front and rear sides on the right side of the sliding placement frame 143 through bolts. After the racks 155 move leftward, they will mesh with the spur gears 152. The first rubber fixtures 153 are symmetrically arranged on the front and rear of the top of the first rotating shaft 151. The clamping block 154 is welded to the right side of the sliding placement frame 143. After the first rubber fixtures 153 rotate, they will contact the clamping block 154.

[0046] Please refer to Figure 11 , the positioning mechanism 16 includes a fixed rod 161, a first sliding rod 162, a first spring 163 and a second rubber fixture 164. The fixed rods 161 are symmetrically welded to the front and rear of the left and right sides on the lower side of the sliding placement frame 143. The first sliding rods 162 are slidably connected to the four fixed rods 161. The first springs 163 are connected between the outer sides of the four fixed rods 161 and the first sliding rods 162 on the same side. The second rubber fixtures 164 are connected between the inner sides of the two first sliding rods 162 on the same side horizontally.

[0047] Place the object to be observed on the lower side inside the sliding placement rack 143. Then, manually move the first sliding rod 162 inward, thereby driving the second rubber clamp 164 to move inward. At this time, the first spring 163 is stretched, enabling the second rubber clamp 164 to limit the object to be observed and making the object to be observed centered. Then, press the main power switch to power on this device, and then press the contact switch 142. The control module controls the first reduction motor 144 to start for five seconds. The output shaft of the first reduction motor 144 drives the lead screw 145 to rotate, thereby driving the sliding placement rack 143 to move leftward. The sliding placement rack 143 drives the rack 155 and the block 154 to move leftward. When the rack 155 moves leftward to mesh with the spur gear 152, it drives the spur gear 152 to rotate, thereby driving the first rotating shaft 151 and the first rubber clamp 153 to rotate. The first rubber clamp 153 rotates to contact the block 154, enabling the first rubber clamp 153 to limit the block 154, and thus limiting the sliding placement rack 143, avoiding the sliding placement rack 143 from jittering due to external factors when the object to be observed is imaged, and thus avoiding the imaging failure of the object to be observed. At this time, the object to be observed moves leftward to the lower side of the beam expander and collimator 3. Then, people manually turn on the semiconductor laser light source 2. The light source emitted by the semiconductor laser light source 2 passes through the beam expander and collimator 3. The beam expander and collimator 3 diffuses the light source into two light sources, one is the object beam and the other is the reference beam. Then, the two light sources irradiate on the object to be observed. The microscopic objective lens 4 observes the object to be observed. The dust-proof cylinder 5 can prevent dust from affecting the final imaging of the object to be observed. The two light sources irradiate on the object to be observed, pass through the microscopic objective lens 4, and irradiate on the first lens 6, and then pass through the first lens 6 and irradiate on the first reflector 7. The first reflector 7 refracts the two light sources, causing the two light sources to be refracted to the second lens 8. Both light sources pass through the second lens 8 and irradiate on the isosceles triangular prism 10, and then pass through the isosceles triangular prism 10 and irradiate on the second reflector 9. People can manually adjust the position of the isosceles triangular prism 10 to adjust the refraction angle of the two light sources, so that the two light sources intersect and irradiate on the filter 11. The filtered two light sources irradiate on the third lens 12. The third lens 12 performs an inverse Fourier transform on the filtered reference light wave and object light wave. The reference light wave and the object light wave have an included angle and meet the relevant conditions. Therefore, interference occurs on the target surface of the imaging detector 13, forming an off-axis hologram, which is recorded by the imaging detector 13. Using the well-known numerical reconstruction algorithm in the field of digital holography to reconstruct the off-axis hologram recorded and captured by the imaging detector 13, the phase information of the measured object can be obtained. In this way, the object beam and the reference beam can share the same optical path, effectively compensating for the environmental interference on the two interference beams and significantly enhancing the time stability of the system. After the observation is completed, manually turn off the semiconductor laser light source 2, and then press the contact switch 142,The control module controls the output shaft of the first reduction motor 144 to reverse for five seconds to reset. The output shaft of the first reduction motor 144 drives the lead screw 145 to reverse and reset, and then drives the sliding placement rack 143, the clamping block 154 and the rack 155 to move rightward and reset. The rack 155 drives the spur gear 152 to reverse, and then drives the first rubber clamp 153 to rotate upward and reset, so that the first rubber clamp 153 releases the clamping block 154. Then people release the first sliding rod 162. At this time, the first spring 163 resets, driving the first sliding rod 162 and the second rubber clamp 164 to move outward and reset, so that the second rubber clamp 164 releases the observed object. People can take out the observed object. When not in use, press the main power switch again to cut off the power of this device.

[0048] Embodiment 2

[0049] On the basis of Embodiment 1, please refer to Figure 12 , and it further includes an auxiliary mechanism 17. The auxiliary mechanism 17 includes a fixed seat 171, a second sliding rod 172, a second spring 173 and a top block 174. Two fixed seats 171 are fixedly connected to the right side of the sliding placement rack 143 by bolts. The two fixed seats 171 are both slidably connected with a second sliding rod 172 inside. A second spring 173 is connected between the upper parts of the two second sliding rods 172 and the top of the fixed seat 171 on the same side. The lower sides of the two second sliding rods 172 are both welded with a top block 174, and both top blocks 174 are in contact with the first sliding rod 162 on the same side.

[0050] When the sliding placement rack 143 moves leftward, it drives the clamping block 154 to move leftward, thereby driving the fixed seat 171, the second sliding rod 172 and the top block 174 to move leftward. When the first rubber clamp 153 rotates downward to contact the second sliding rod 172, it drives the second sliding rod 172 to move downward. At this time, the second spring 173 is compressed. At the same time, the second sliding rod 172 drives the top block 174 to move downward, so that the top block 174 drives the first sliding rod 162 to move inward. At this time, the first spring 163 is stretched. In this way, it is not necessary for people to manually control the sliding of the first sliding rod 162, reducing the trouble of people's operation. When the first rubber clamp 153 rotates upward and resets, at this time, the second spring 173 resets, driving the second sliding rod 172 and the top block 174 to move upward and reset. At this time, the first spring 163 resets, driving the first sliding rod 162 to move outward and reset.

[0051] Please refer to Figures 13 - 17, it also includes a dust-proof mechanism 18. The dust-proof mechanism 18 includes a first distance sensor 181, a second fixing bracket 182, a second reduction motor 183, a second rotating shaft 184, a dust-proof winding cloth 185, a third sliding rod 186, a guide rod 187, a fourth spring 188 and a fifth spring 189. The first distance sensor 181 is slidably placed on the upper right side of the sliding placement rack 143. The second fixing bracket 182 is welded to the front side of the top of the first fixing bracket 1. The second reduction motor 183 is fixedly connected to the left side of the first fixing bracket 1 by bolts. The middle part of the first fixing bracket 1 is connected to the second rotating shaft 184 through a bearing. The left side of the second rotating shaft 184 is connected to the output shaft of the second reduction motor 183 through a coupling. The dust-proof winding cloth 185 is provided on the second rotating shaft 184. The third sliding rod 186 is slidably connected to the front side of the first fixing bracket 1. The third sliding rod 186 is located above the filter 11. The third sliding rod 186 is connected to the lower side of the dust-proof winding cloth 185. The left and right sides of the third sliding rod 186 are both slidably connected to the guide rod 187. The upper sides of the two guide rods 187 are both slidably connected to the second fixing bracket 182. The lower sides of the two guide rods 187 are both connected to the third sliding rod 186 by the fourth spring 188. The upper sides of the two guide rods 187 are both connected to the upper rear side inside the second fixing bracket 182 by the fifth spring 189.

[0052] When the sliding placement rack 143 moves to the left, it drives the first distance sensor 181 to move to the left. When the first distance sensor 181 detects that the distance from the first fixing bracket 1 reaches the preset value, the control module controls the second reduction motor 183 to start for five seconds. The output shaft of the second reduction motor 183 drives the second rotating shaft 184 to rotate, so that the second rotating shaft 184 winds up the dust-proof winding cloth 185, and then drives the third sliding rod 186 to move backward and upward. The third sliding rod 186 drives the guide rod 187 to move backward and upward. At this time, the fifth spring 189 is compressed. Under the action of the second fixing bracket 182, the fourth spring 188 undergoes an adaptive deformation. In this way, the second rotating shaft 184 can wind up the dust-proof winding cloth 185. When the sliding placement rack 143 drives the first distance sensor 181 to move to the right and reset, the first distance sensor 181 detects that the distance from the first fixing bracket 1 returns to the initial value. The control module controls the output shaft of the second reduction motor 183 to reverse for five seconds to reset. The output shaft of the second reduction motor 183 drives the second rotating shaft 184 to reverse and reset, so that the second rotating shaft 184 relaxes the dust-proof winding cloth 185. At this time, the fifth spring 189 resets, driving the guide rod 187, the third sliding rod 186 and the dust-proof winding cloth 185 to move forward and downward to reset, so that the dust-proof winding cloth 185 unfolds. In this way, the dust-proof winding cloth 185 can prevent dust from falling on the second lens 8, the second reflector 9, the isosceles triangular prism 10, the filter 11, the third lens 12 and the imaging detector 13, and further prevent dust from affecting the imaging result.

[0053] Please refer to Figures 18 - 19, further comprising a moisture-proof mechanism 19. The moisture-proof mechanism 19 includes a second distance sensor 191, a first electric push rod 192, and a constant-temperature electric heating sheet 193. The second distance sensor 191 is provided on the upper left side of the second fixing frame 182. The left and right sides of the lower side of the first fixing frame 1 are both fixedly connected by bolts with the first electric push rods 192. The telescopic rods of the two first electric push rods 192 are slidably connected to the first fixing frame 1. A constant-temperature electric heating sheet 193 is connected between the tops of the telescopic rods of the two first electric push rods 192. The constant-temperature electric heating sheet 193 is slidably connected to the dust-proof cylinder 5.

[0054] When the left guiding rod 187 moves backward and upward to approach the second distance sensor 191, the second distance sensor 191 detects that the distance to the left guiding rod 187 reaches a preset value. The control module controls the telescopic rod of the first electric push rod 192 to extend for one second and then contract for one second, and so on in a cycle. At the same time, the control module also controls the constant-temperature electric heating sheet 193 to start, so that the constant-temperature electric heating sheet 193 heats the dust-proof cylinder 5, avoiding moisture in the dust-proof cylinder 5 due to humid weather, which may affect the imaging result of the object. When the left guiding rod 187 moves forward and downward to reset, the second distance sensor 191 detects that the distance to the left guiding rod 187 returns to the initial value, and the control module controls the telescopic rod of the first electric push rod 192 and the constant-temperature electric heating sheet 193 to stop.

[0055] Please refer to Figure 20 , further comprising an anti-shake mechanism 20. The anti-shake mechanism 20 includes a temperature sensor 201, a second electric push rod 202, an elastic component 203, and a suction cup 204. The temperature sensor 201 is provided on the lower left side of the dust-proof cylinder 5. The left and right sides of the lower side of the first fixing frame 1 are both fixedly connected by bolts with two second electric push rods 202. Elastic components 203 are provided at the bottoms of the telescopic rods of the four second electric push rods 202. The four elastic components 203 are each composed of a telescopic block and a spring. The four telescopic blocks are all connected to the bottom of the second electric push rod 202 on the same side, and the four springs are all connected to the telescopic blocks. Suction cups 204 are provided at the bottoms of the four elastic components 203.

[0056] The temperature sensor 201 is set with two preset values, where the first preset value is greater than the second preset value. When the temperature sensor 201 detects that the temperature on the dust-proof cylinder 5 rises to reach the first preset value, the control module controls the telescopic rod of the second electric push rod 202 to extend for three seconds. The telescopic rod of the second electric push rod 202 drives the elastic component 203 and the suction cup 204 to move downward, so that the suction cup 204 contacts the ground, and then the suction cup 204 adsorbs the ground. At this time, the elastic component 203 plays a buffering role here. In this way, when an object is imaged, it can be avoided from being affected by any mechanical vibration or air disturbance, preventing different effects on the two separated light beams. When the temperature sensor 201 detects that the temperature on the dust-proof cylinder 5 drops to reach the second preset value, the control module controls the telescopic rod of the second electric push rod 202 to contract for three seconds to reset, and the telescopic rod of the second electric push rod 202 drives the elastic component 203 and the suction cup 204 to move upward to reset.

[0057] Please refer to Figure 8 、 Figure 21 and Figure 22 , and it further includes a control box 141. The middle part at the rear side of the first fixing frame 1 is fixedly connected with the control box 141 by bolts. The control box 141 includes a storage battery, a power supply module and a control module. The storage battery powers the entire common-path off-axis digital holographic microscopy device with adjustable shear amount. The output end of the storage battery is electrically connected to the power supply module. A main power switch is connected to the power supply module through a circuit. The power supply module is electrically connected to the control module; a DS1302 clock circuit and a 24C02 circuit are connected to the control module; the first distance sensor 181, the second distance sensor 191, the temperature sensor 201 and the contact switch 142 are all electrically connected to the control module. The first reduction motor 144 and the second reduction motor 183 are both connected to the control module through a DC motor forward and reverse module. The first electric push rod 192, the second electric push rod 202 and the constant temperature electric heating sheet 193 are all connected to the control module through a relay control module.

[0058] For those skilled in the art, according to the technical solutions and concepts described above, various corresponding changes and deformations can be made, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims

1. A common-path off-axis digital holographic microscopy device with adjustable shear amount, comprising a first fixing frame (1), a semiconductor laser light source (2), a microscope objective lens (4), a first lens (6), a first mirror (7), a second lens (8), a second mirror (9), a filter (11) and a third lens (12). The upper part of the first fixing frame (1) is connected with the semiconductor laser light source (2), the middle part of the first fixing frame (1) is connected with the microscope objective lens (4), the lower side of the middle part of the first fixing frame (1) is connected with the first lens (6), the lower side of the middle part of the first fixing frame (1) is connected with the first mirror (7), the lower front side of the first fixing frame (1) is connected with the second lens (8), the lower front side of the first fixing frame (1) is connected with the second mirror (9), the filter (11) is slidably connected to the front side of the first fixing frame (1), and the third lens (12) is connected to the front side of the first fixing frame (1). It is characterized in that, It further includes a beam expander collimator (3), a dust-proof cylinder (5), an isosceles triangular prism (10), an imaging detector (13), a placement mechanism (14), a shock-proof mechanism (15) and a positioning mechanism (16). The upper part of the first fixing frame (1) is connected with a beam expander collimator (3). A dust-proof cylinder (5) for isolating dust is arranged on the lower side of the first fixing frame (1). An isosceles triangular prism (10) is slidably connected to the front lower side of the first fixing frame (1). An imaging detector (13) is connected to the middle part of the first fixing frame (1). A wire is connected between the rear side of the imaging detector (13) and the microscope objective (4). A placement mechanism (14) for placing the object to be observed is arranged on the upper part of the first fixing frame (1). A shock-proof mechanism (15) for avoiding jitter from affecting imaging is connected between the components of the placement mechanism (14) and the first fixing frame (1). A positioning mechanism (16) for positioning the object to be observed is connected between the components of the placement mechanism (14) and the first fixing frame (1). The placement mechanism (14) includes a contact switch (142), a sliding placement rack (143), a first reduction motor (144) and a lead screw (145). The contact switch (142) is arranged on the upper rear side of the first fixing frame (1). A sliding placement rack (143) for placing the object to be observed is slidably connected to the upper part of the first fixing frame (1). The first reduction motor (144) is connected to the upper left side of the first fixing frame (1). A lead screw (145) is rotatably connected to the upper part of the first fixing frame (1). The output shaft of the first reduction motor (144) is connected to the left side of the lead screw (145). The right side of the lead screw (145) is threadedly connected to the upper right side of the sliding placement rack (143). The shock-proof mechanism (15) includes a first rotating shaft (151), a spur gear (152), a first rubber clamp (153), a block (154) and a rack (155). The first rotating shaft (151) is rotatably connected to the upper right part of the first fixing frame (1). Spur gears (152) are symmetrically connected to the front and rear of the first rotating shaft (151). Racks (155) are connected to the front and rear sides of the right side of the sliding placement rack (143). After the racks (155) move leftward, they will mesh with the spur gears (152). First rubber clamps (153) for limiting the sliding placement rack (143) are symmetrically arranged on the front and rear of the top of the first rotating shaft (151). A block (154) for assisting the first rubber clamp (153) to limit the sliding placement rack (143) is connected to the right side of the sliding placement rack (143).

2. The off-axis digital holographic microscopy device with a common optical path and adjustable shear amount according to claim 1, characterized in that, The positioning mechanism (16) includes a fixed rod (161), a first sliding rod (162), a first spring (163) and a second rubber clamp (164). Fixed rods (161) are symmetrically connected to the front and rear on both the left and right sides of the lower side of the sliding placement rack (143). A first sliding rod (162) is slidably connected to each of the four fixed rods (161). A first spring (163) is connected between the outer side of each of the four fixed rods (161) and the first sliding rod (162) on the same side. A second rubber clamp (164) for positioning the object to be observed is connected between the inner sides of the two first sliding rods (162) on the same lateral side.

3. The common-path off-axis digital holographic microscopy device with adjustable shear amount according to claim 2, characterized in that, It further includes an auxiliary mechanism (17) for assisting the first sliding rod (162) to move by itself. The auxiliary mechanism (17) includes a fixed seat (171), a second sliding rod (172), a second spring (173) and a top block (174). Two fixed seats (171) are connected to the right side of the sliding placement rack (143). A second sliding rod (172) is slidably connected to the inside of each of the two fixed seats (171). A second spring (173) is connected between the upper part of each of the two second sliding rods (172) and the top of the fixed seat (171) on the same side. A top block (174) for driving the first sliding rod (162) to move is connected to the lower side of each of the two second sliding rods (172).

4. A common-path off-axis digital holographic microscopy device with adjustable shear amount according to claim 3, characterized in that, It further includes a dust-proof mechanism (18) for blocking dust. The dust-proof mechanism (18) includes a first distance sensor (181), a second fixing frame (182), a second reduction motor (183), a second rotating shaft (184), a dust-proof rolling cloth (185), a third sliding rod (186), a guiding rod (187), a fourth spring (188) and a fifth spring (189). A first distance sensor (181) is provided on the upper right side of the sliding placement rack (143). A second fixing frame (182) is connected to the front side of the top of the first fixing frame (1). A second reduction motor (183) is connected to the left side of the first fixing frame (1). A second rotating shaft (184) is rotatably connected to the middle of the first fixing frame (1). The left side of the second rotating shaft (184) is connected to the output shaft of the second reduction motor (183). A dust-proof rolling cloth (185) for blocking dust is provided on the second rotating shaft (184). A third sliding rod (186) is slidably connected to the front side of the first fixing frame (1). The third sliding rod (186) is connected to the lower side of the dust-proof rolling cloth (185). The left and right sides of the third sliding rod (186) are both slidably connected to guiding rods (187). The upper sides of the two guiding rods (187) are both slidably connected to the second fixing frame (182). A fourth spring (188) is connected between the lower sides of the two guiding rods (187) and the third sliding rod (186). A fifth spring (189) is connected between the upper sides of the two guiding rods (187) and the upper rear side inside the second fixing frame (182).

5. The common-path off-axis digital holographic microscopy device with adjustable shear amount according to claim 4, characterized in that, It further includes a moisture-proof mechanism (19) for removing moisture. The moisture-proof mechanism (19) includes a second distance sensor (191), a first electric push rod (192), and a constant-temperature electric heating sheet (193). The second distance sensor (191) is provided on the upper left side of the second fixing frame (182). The left and right sides of the lower side of the first fixing frame (1) are both connected with a first electric push rod (192). The telescopic rods of the two first electric push rods (192) are slidably connected to the first fixing frame (1). A constant-temperature electric heating sheet (193) is connected between the tops of the telescopic rods of the two first electric push rods (192). The constant-temperature electric heating sheet (193) is slidably connected to the dust-proof cylinder (5).

6. The common-path off-axis digital holographic microscopy device with adjustable shear amount according to claim 5, wherein It further includes an anti-shake mechanism (20) for stabilizing the shear amount adjustable common-path off-axis digital holographic microscope device. The anti-shake mechanism (20) includes a temperature sensor (201), a second electric push rod (202), an elastic component (203), and a suction cup (204). The temperature sensor (201) is provided on the lower left side of the dust-proof cylinder (5). The left and right sides of the lower side of the first fixing frame (1) are both connected with two second electric push rods (202). Elastic components (203) are provided at the bottoms of the telescopic rods of the four second electric push rods (202). Suction cups (204) for adsorbing the ground are provided at the bottoms of the four elastic components (203).

7. A common-path off-axis digital holographic microscopy device with adjustable shear amount according to claim 6, characterized in that, It further includes a control box (141). The control box (141) is connected to the middle part of the rear side of the first fixing frame (1). The control box (141) includes a storage battery, a power supply module, and a control module. The storage battery supplies power to the entire shear amount adjustable common-path off-axis digital holographic microscope device. The output end of the storage battery is electrically connected to the power supply module. A main power switch is connected to the power supply module through a circuit. The power supply module is electrically connected to the control module; a DS1302 clock circuit and a 24C02 circuit are connected to the control module; the first distance sensor (181), the second distance sensor (191), the temperature sensor (201), and the contact switch (142) are all electrically connected to the control module. The first reduction motor (144) and the second reduction motor (183) are both connected to the control module through a DC motor forward and reverse module. The first electric push rod (192), the second electric push rod (202), and the constant-temperature electric heating sheet (193) are all connected to the control module through a relay control module.

Images