CN102087413A - Optical method for normal imaging, microscopic and telescopic functions - Google Patents

Abstract

The invention discloses an optical method capable of realizing normal imaging, microscopy and telescopic functions, which comprises the following steps: firstly, placing an imaging object in front of an optical lens unit; imaging an imaging object on an imaging unit through an optical lens unit, and converting the acquired analog signal into a digital image signal; transmitting the digital image signal to a display unit, transmitting the digital image signal to a control unit by the display unit, and judging whether the imaged object is in a clear state by the control unit, wherein the clear state is shown as a definition threshold value; if the imaging object is not in a clear state, the control unit converts the acquired definition parameter into an adjustment parameter; and fifthly, the control unit feeds back the adjustment parameters to an adjusting unit, and the adjusting unit adjusts the spatial positions of the optical lens unit and the imaging unit so as to enable the imaged object to be in a clear state. The invention can greatly enhance the convenience of users.

Description

Optical method for normal imaging, microscopic and telescopic functions

technical field

The invention relates to an optical method, in particular to an optical method capable of realizing normal imaging, microscopic and telescopic functions.

Background technique

Nowadays, the optical part of the traditional camera can only realize the normal imaging of the object, the microscope can only show the imaging and magnification function of the close-range object, and the electronic telescope can realize the observation of the long-distance object. When going out, people will encounter situations that require the use of microscopes, such as authenticating and counterfeiting banknotes, judging their own skin conditions, etc.; at the same time, they will occasionally encounter situations that require the use of binoculars. However, today's technology cannot realize normal imaging, microscopic and telephoto functions in one product at the same time, which brings inconvenience and trouble to users.

Contents of the invention

The present invention aims at providing an optical method capable of realizing normal imaging, microscopic and telescopic functions aiming at the defects existing in the above-mentioned background technology.

In order to achieve the above object, the present invention discloses an optical method capable of realizing normal imaging, microscopic and telescopic functions, which includes the following steps: step ①, placing the imaging object in front of an optical lens unit, adjusting the optical The distance between the lens unit and the imaging object to achieve normal imaging, microscopic or telephoto functions; step ②, the imaging object is imaged on an imaging unit through the optical lens unit, and the collected analog The signal is converted into a digital image signal; step ③, the digital image signal is transmitted to a display unit to be presented in the form of a digital image, and the display unit transmits the digital image to a control unit, and the control unit according to the obtained The image clarity and image size of the digital image are used to automatically determine whether the imaging object is in a clear state, and the clarity state is shown as a sharpness threshold; step ④, if the imaging object is not in a clear state, the control unit will obtain the clarity The parameter is converted into an adjustment parameter; step 5., the control unit feeds back the adjustment parameter to an adjustment unit, and the adjustment unit adjusts the spatial position of the optical lens unit and the imaging unit so that the imaging object is in a clear state .

Further, in step ①, when the distance between the imaging object and the optical lens unit is less than the focal length of the optical lens unit, it is in a microscopic state; when the imaging object and the optical lens unit When the distance between is between the focal length of the optical lens unit and 2 times the focal length, it appears as normal imaging; when the distance between the imaging object and the optical lens unit is greater than 2 times the focal length of the optical lens unit , presents a telephoto state.

Further, in step ③, the display unit transmits the digital image to the control unit through a USB interface unit.

Further, the optical lens unit, the imaging unit, the USB interface unit are electrically connected to the display unit in sequence, the adjustment unit is respectively connected to the optical lens unit and the imaging unit, and the adjustment unit and the display unit are respectively connected to the control unit The adjustment unit adjusts the spatial positions of the optical lens unit and the imaging unit respectively through the adjustment parameters fed back by the control unit.

Further, the adjusting unit includes a first micromotor electrically connected to the optical lens unit, a second micromotor electrically connected to the imaging unit, and a slide rail, the first micromotor is connected to the The second micro motors are respectively electrically connected to the control unit, and the optical lens unit and the imaging unit are respectively slidably arranged on the slide rail.

Further, the imaging unit is a CMOS digital sensor.

In summary, the optical method of the present invention can realize normal imaging, microscopic and telescopic functions through the control unit to automatically judge whether the digital image is in a clear state and obtain the adjustment parameters, and then feed the adjustment parameters to the The adjustment unit finally adjusts the spatial position of the optical lens unit and the imaging unit to achieve the required definition, so that normal imaging, microscopic and telephoto functions can be realized, which greatly enhances the convenience of users.

Description of drawings

Fig. 1 is a flow chart of an embodiment of the present invention;

Fig. 2 is a functional block diagram of the present invention.

Detailed ways

In order to further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1 and Fig. 2, the optical method that the present invention can realize normal imaging, microscope and telephoto function is realized by an optical system 1, and described optical system 1 comprises an optical lens unit 10, an imaging unit 20, a USB The interface unit 30 , an adjustment unit, a control unit 50 and a display unit 60 . The optical lens unit 10 , the imaging unit 20 , the USB interface unit 30 and the display unit 60 are electrically connected in sequence. The adjusting unit is respectively connected with the optical lens unit 10 and the imaging unit 20 . The adjustment unit and the display unit 60 are electrically connected to the control unit 50 respectively. The adjusting unit is used to adjust the spatial positions of the optical lens unit 10 and the imaging unit 20 . The adjustment unit includes a first micromotor 41 electrically connected to the optical lens unit 10 , a second micromotor 42 electrically connected to the imaging unit 20 , and a sliding rail 43 . The first micromotor 41 and the second micromotor 42 are electrically connected to the control unit 50 respectively, and the optical lens unit 10 and the imaging unit 20 are respectively slidably arranged on the slide rail 43 .

Please continue to refer to Figure 1 and Figure 2, the optical method that can realize normal imaging, microscopic and telephoto functions includes the following steps:

Step ①, placing the imaging object in front of the optical lens unit 10, and adjusting the distance between the imaging object and the optical lens unit 10 to achieve normal imaging, microscopic or telephoto functions. When the distance between the imaging object and the optical lens unit 10 is smaller than the focal length of the optical lens unit 10 , it appears as a microscopic state. When the distance between the imaging object and the optical lens unit 10 is between the focal length and twice the focal length of the optical lens unit 10 , normal imaging occurs. When the distance between the imaging object and the optical lens unit 10 is greater than twice the focal length of the optical lens unit 10 , it is in a telephoto state.

In step ②, the imaging object is imaged on the imaging unit 20 through the optical lens unit 10, and the collected analog signal is converted into a digital image signal. In this embodiment, the imaging unit 20 is a CMOS digital sensor.

In step ③, the digital image signal is transmitted to the display unit through the USB interface unit 30 to be displayed as a digital image. The display unit transmits the digital image to the control unit 50 . The control unit 50 automatically judges whether the imaged object is in a clear state according to the image sharpness of the obtained digital image, and the clear state is represented as a sharpness threshold.

In step ④, if the imaging object is not in a clear state, the control unit 50 converts the obtained sharpness parameter into an adjustment parameter. If the imaging object is in a clear state, the following steps do not need to be performed.

Step ⑤, the control unit 50 feeds back the adjustment parameters to the adjustment unit, and the adjustment unit adjusts the spatial positions of the optical lens unit 10 and the imaging unit 20 through the adjustment parameters fed back by the control unit 50 so that the imaging object is in a clear state.

则所述清晰度阈值体现为所述像素值的方差S，所述方差S的平方的计算方式如下列公式所示：The image clarity in the step ③ refers to the clarity of each detail shadow pattern and its boundary on the image. Specifically, the digital image is essentially composed of pixels of different grayscales, and the image clarity refers to whether the grayscale values between pixels can be effectively separated to present the largest degree of dispersion. Set the pixel values on the digital image as X ₁ , X ₂ , X ₃ ........ X _n in sequence, and the average value of the pixel values is

Then the sharpness threshold is embodied as the variance S of the pixel value, and the calculation method of the square of the variance S is shown in the following formula:

${\mathrm{<span\; class="notranslate">\; S</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; \{</span>{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>}\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; -</span>}\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; -</span>}\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; .</span><span\; class="notranslate">\; +</span>{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; no</span>}<span\; class="notranslate">\; -</span>}\stackrel{<span\; class="notranslate">\; \&OverBar;</span>}{\mathrm{<span\; class="notranslate">\; x</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; \}</span><span\; class="notranslate">\; /</span>\mathrm{<span\; class="notranslate">\; no</span>}$

The control unit 50 presets a desired sharpness threshold S _n . In step ③, the control unit 50 calculates the sharpness parameter of the obtained digital image to obtain S ₁ , and the control unit 50 compares the S ₁ with the required sharpness threshold S _n . If the S ₁ <S _n , the definition of the digital image does not meet the preset requirements of the control unit 50, so the control unit 50 compares the S ₁ with S _n to obtain the adjustment parameter . The adjustment parameters include the distance X- _ray that the optical lens unit 10 needs to move and the distance X that the imaging unit 20 needs _to move. The control unit 50 feeds back the adjustment parameters to the adjustment unit, so that the first micromotor 41 controls the optical lens unit 10 to move the X- _ray on the slide rail 43, and the second micromotor 42 Controlling the imaging unit 20 to move on the sliding rail 43 _by X to make the definition parameter of the digital image reach the standard preset by the control unit 50 , even if S ₁ ≥ S _n . If the control unit 50 compares and finds that S ₁ ≥ S _n , there is no need to perform steps ③ and subsequent steps.

The table below shows the corresponding relationship between the X _-ray and X-ray and the _{magnification} when the control unit 50 automatically judges that the definition of the digital image does not meet the requirements under a certain microscopic environment. In the table below, a positive value of the X- _ray or X _indicates that the optical lens unit 10 or imaging unit 20 moves toward the direction of the imaging object, and a negative value of the X- _ray or X _indicates that the optical lens The unit 10 or the imaging unit 20 moves in a direction away from the imaged object. The following data are only obtained under a specific environment, and cannot be used as a complete reference. Finally, the adjustment parameters calculated by the control unit 50 shall prevail.

(Table I)

gain X- _ray X _Cheng 20X -0.1mm 0mm 50X 0.1mm 0.1mm 100X 0.2mm 0.3mm 200X 0.3mm 0.5mm 500X 0.4mm 0.7mm

Through Table 1, it can be more intuitively understood that the optical method of the present invention, which can realize normal imaging, microscopic and telescopic functions, automatically judges whether the digital image is in a clear state through the control unit 50 and obtains the adjustment parameters, and then the described The adjustment parameters are fed back to the adjustment unit, and finally the definition is achieved by adjusting the spatial positions of the optical lens unit 10 and the imaging unit 20 .

To sum up, the optical method of the present invention can realize normal imaging, microscopic and telescopic functions through the control unit 50 to automatically judge whether the digital image is in a clear state and obtain the adjustment parameters, and then feed back the adjustment parameters For the adjustment unit, finally by adjusting the spatial position of the optical lens unit 10 and the imaging unit 20 to make the definition meet the requirements, so that normal imaging, microscopic and telephoto functions can be realized in one product, which greatly enhances the use of Convenience to the reader and cost savings at the same time.

The above-mentioned embodiment only expresses one implementation mode of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims (6)

1. An optical method capable of realizing normal imaging, microscopic and telescopic functions, is characterized in that comprising the steps: Step 1. placing the imaging object in front of an optical lens unit (10), adjusting the distance between the optical lens unit (10) and the imaging object to achieve normal imaging, microscopic or telescopic functions; Step 2. Imaging the imaging object on an imaging unit (20) through the optical lens unit (10), and converting the collected analog signal into a digital image signal; Step 3. The digital image signal is transmitted to a display unit (60) to be displayed as a digital image, and the display unit (60) transmits the digital image to a control unit (50), and the control unit (50) automatically judging whether the imaging object is in a clear state according to the image sharpness and image size of the obtained digital image, and the clear state is presented as a sharpness threshold; Step ④, if the imaging object is not in a clear state, the control unit (50) converts the obtained sharpness parameter into an adjustment parameter; Step 5. The control unit (50) feeds back the adjustment parameters to an adjustment unit, and the adjustment unit adjusts the spatial positions of the optical lens unit (10) and the imaging unit (20) so that the imaging object is located at state of clarity. 2. The optical method capable of realizing normal imaging, microscopic and telescopic functions according to claim 1, characterized in that: in step ①, when the imaging object and the optical lens unit (10) When the distance is less than the focal length of the optical lens unit (10), it appears as a microscopic state; when the distance between the imaging object and the optical lens unit (10) is the focal length of the optical lens unit (10) and When between 2 times the focal length, it appears as normal imaging; when the distance between the imaging object and the optical lens unit (10) is greater than 2 times the focal length of the optical lens unit (10), it appears as a telephoto state . 3. The optical method capable of realizing normal imaging, microscopic and telescopic functions according to claim 2, characterized in that: in step ③, the display unit (60) transmits the digital image through a USB interface unit (30) transmitted to said control unit (50). 4. The optical method capable of realizing normal imaging, microscopic and telescopic functions according to claim 3, characterized in that: said optical lens unit (10), imaging unit (20), USB interface unit (30) and The display unit (60) is electrically connected in turn, and the adjustment unit is respectively connected to the optical lens unit (10) and the imaging unit (20), and the adjustment unit and the display unit (60) are respectively electrically connected to the control unit (50). connected, the adjustment unit adjusts the spatial positions of the optical lens unit (10) and the imaging unit (20) respectively through the adjustment parameters fed back by the control unit (50). 5. The optical method capable of realizing normal imaging, microscopic and telescopic functions according to claim 4, characterized in that: the adjustment unit includes a first micro-motor electrically connected to the optical lens unit (10) (41), a second micromotor (42) electrically connected to the imaging unit (20) and a slide rail (43), the first micromotor (41) and the second micromotor (42) They are respectively electrically connected to the control unit (50), and the optical lens unit (10) and the imaging unit (20) are respectively slidably arranged on the slide rail (43). 6. The optical method capable of realizing normal imaging, microscopic and telescopic functions according to claim 5, characterized in that: the imaging unit (20) is a CMOS digital sensor.

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