CN2930606Y

CN2930606Y - Slit projection angle measuring and digital display apparatus of slit-lamp microscope

Info

Publication number: CN2930606Y
Application number: CN 200620040856
Authority: CN
Inventors: 舒虎萌; 郑宏彪
Original assignee: YIDE MEDICAL EQUIPMENT CO Ltd SHANGHAI
Current assignee: YIDE MEDICAL EQUIPMENT CO Ltd SHANGHAI
Priority date: 2006-04-07
Filing date: 2006-04-07
Publication date: 2007-08-08
Anticipated expiration: 2016-04-07

Abstract

The utility model relates to a device for measuring and displaying slit projection angle of a slit-lamp microscope, which comprises an angle-displacement sensor arranged between a microscope arm and a slit arm. The angle-displacement sensor comprises a fixed shaft arranged on the microscope arm or the slit arm, an active shaft arranged on the slit arm or the microscope arm correspondingly. An electrical signal achieved from the angle-displacement sensor either is processed by an A/D converter and a microprocessor and is displayed by a digital displayer, or is outputted by an interface circuit for providing real-time and accurately slit projection angle data to a digital imaging system, or is inputted into a computer system. Without changing the structure of the conventional slit-lamp microscope, the utility model is able to measure and display the slit projection angle to provide a vital parameter for diagnosis, medical care, teaching and scientific research of the ophthalmology. The utility model provides optimal condition for accurately judging the change of disease and therapy effect.

Description

The measurement of crevice lamp microscopic crevice projection angle and digital display device

Technical field

This utility model relates to the ophthalmic diagnosis treatment and uses slit lamp microscope, specifically refers to the measurement and the digital display device of the crack crevice projection angle in the slit lamp microscope.

Background technology

Slit lamp microscope is the common instrument of ophthalmologic examination, the slit lamp light source is with the form irradiation eyeball of " optical section ", thereby can clearly show " section " of different tissues in the eyeball, thereby make the doctor clearly observe the pathological changes situation of patient eye inner tissue and to make diagnosis according to this by the microexamination system.Slit lamp microscope mainly is made up of micro-arm and the crack arm be located on the base.The vertical pivot of micro-arm is enclosed within on the main shaft of being located on the base, and arm vertical pivot in crack is enclosed within on the fixing micro-arm, and therefore micro-arm can rotate around main shaft, and the crack arm can rotate around micro-arm again.The microexamination system is located on the micro-arm, and slit lamp light source projects system is located on the arm of crack, referring to Fig. 1.

Angle between the optical axis of microexamination system and the crack projection light optical axis, the relative angle between promptly micro-arm and the crack arm, the crevice projection angle that makes slit lamp throw light on claims the crack crevice projection angle again.Crack crevice projection angle when the optical axis of microexamination system and crack projection light optical axis coincidence is 0 ° or claims zero point.

The crack arm of present slit lamp microscope can be since zero point, in each scope of 90 ° of micro-arm, rotate clockwise or counterclockwise, and the crack crevice projection angle be 0 ° ,+establish a labelling when 10 ° and-10 °, for doctor's reference.Because this device can't accurately be measured the crack crevice projection angle, so the doctor can't know crack crevice projection angle when observing focus definitely.Because the crack crevice projection angle is one of key factor of crack imaging, crack crevice projection angle difference, shown image has very big difference, lack this key parameter of crack crevice projection angle, the contrast of the image before and after preoperative and postoperative and the treatment has just lost foundation, particularly when adopting digital device to take MIcrosope image, it is limited adopting twice different image data of crack crevice projection angle to compare its medical value, if forming diagnosis according to this just deviation may occur, will influence quality of diagnosis.

Summary of the invention

A purpose of the present utility model is measurement and the digital display device that proposes a kind of crevice lamp microscopic crevice projection angle, can be on the basis that does not change existing slit lamp microscope structure substantially, realize measurement and digital demonstration by this device, thereby provide definite crack crevice projection angle data for the doctor the crack crevice projection angle.

The measurement digital display device of crevice lamp microscopic crevice projection angle of the present utility model, mainly comprise the main shaft 1 on the slit lamp microscope base 9, crack arm 5 and micro-arm 6, the microexamination system is located on the micro-arm 6, slit lamp light source projects system is located on the crack arm 5, described micro-arm 6 vertical pivots are placed on the main shaft of being located on the base 91, described crack arm 5 pivots are enclosed within on the micro-arm 6, it is characterized in that installing one angle displacement sensor 3 between crack arm 5 and micro-arm 6, the dead axle of this angle displacement sensor 3 and micro-arm 6 are fixed on the micro-arm 6 coaxially, its moving axis and crack arm 5 are fixed on the crack arm 5 coaxially, after the variable quantity of the crack crevice projection angle that is obtained by angle displacement sensor 3 converts the signal of telecommunication to, convert digital signal input microprocessor 22 to through A/D converter 21, and show by nixie display 23.

Data after microprocessor processes also can be exported by interface circuit, for digital imaging system provides the real-time illumination of crack accurately crevice projection angle data, or are input to computer system.

Angle displacement sensor described in the utility model can adopt a rotary precision potentiator that has a moving contact.Adopt potentiometer as angle displacement sensor, have the position memory function.

The beneficial effects of the utility model are: can be on the basis of the structure that does not change existing slit lamp microscope by this device, realization is to the measurement and the digital display of crack crevice projection angle, for diagnosis, medical treatment, the teaching and scientific research of ophthalmology provides an important parameters foundation, for the variation and the therapeutic effect of the more accurate judgement state of an illness have been created condition.

Description of drawings

Fig. 1 represents that band of the present invention crack crevice projection angle is measured and the sketch map of the slit lamp microscope of digital display device;

Fig. 2 is the structural representation of expression crack of the present invention crevice projection angle measure portion;

Fig. 3 is the theory diagram of expression crack of the present invention crevice projection angle data processing section

Among the figure: 1 main shaft, 2 countershafts, 3 angle displacement sensors, 4 shaft couplings, 5 crack arms, 6 micro-arms, 7 crack arm locks, 8 micro-arm locks, 9 bases, 10 digital display boxes, 21A/D transducer, 22 microprocessors (CPU), 23 digital display screens, 24 electric charges coupling camera head (CCD), 25 digital cameras, 26PC machine.

Embodiment

Now the utility model is described in further detail in conjunction with an embodiment and accompanying drawing.

Slit lamp microscope such as Fig. 1 and shown in Figure 2 that present embodiment adopts.Main shaft 1 is fixed in the base 9, as the benchmark rotating shaft of whole system.Other designs a

countershaft

2, and 2 fens upper and lower two parts of this countershaft are established a shoulder in the axis hole of its hollow.The lower end of this countershaft 2 is embedded in the micro-arm 6, makes with micro-arm 6 to become one, and by countershaft 2 micro-arm 6 pivots is enclosed within on the main shaft 1 then, and micro-arm 6 can be rotated flexibly around main shaft 1.Arm 5 pivots in crack are enclosed within the upper end of countershaft 2, and crack arm 5 can be rotated flexibly around countershaft 2 (being micro-arm 6).Be fixed on one heart as the dead axle of the potentiometer of angle displacement sensor 3 on the shoulder in the axis hole of countershaft 2, the moving axis of potentiometer links up coaxially by a shaft coupling 4 and crack arm 6, make crack arm 5 when countershaft 2 rotations, the moving axis of potentiometer is also around its dead axle rotation.

When crack arm 5 when micro-arm 6 produces angle displacements, just synchronously produce angle displacement between the moving axis of potentiometer and the dead axle, the variation of the resistance of potentiometer is directly proportional with the angle displacement amount, and angled variation is changed in the variation of potentiometer resistance, just can finish the measurement of crack crevice projection angle.

As Fig. 3, the potentiometer of angle displacement sensor 3 and R form sample circuit, and the sampling voltage that is directly proportional with the crack crevice projection angle is input microprocessor (CPU) 22 after A/D converter 21 converts digital signal to, is shown by digital display screen 23 after treatment.The output of CPU22 also can link to each other with digital camera 24 by interface circuit, and real-time crack crevice projection angle is provided.CPU22 also can realize communication by interface circuit and computer 26, is used to be recorded in the crack crevice projection angle that reality adopted when taking pictures.

The design of this device has crack arm lock 7 and micro-arm lock 8, as shown in Figure 2.Crack arm lock 7 is eccentric shaft locks, is used to lock crack arm 5 and countershaft 2 (being micro-arm 6), and when lock 7 lockings, crack arm 5 just can not promptly can not rotate around micro-arm 6 around countershaft 2, and at this moment the crack crevice projection angle will remain unchanged.Micro-arm lock 8 also is an eccentric shaft lock, is used to lock countershaft 2 (being micro-arm 6) and main shaft 1, and during locking, micro-arm 6 just can not rotate around main shaft 1.When the doctor needs to adjust viewing angle in the observation process, tend to rotate micro-arm 6, adapting to the needs of observation, crack arm lock 7 can be with crack arm 5 and micro-arm 6 lockings, so when rotating micro-arm 6, can keep the crack crevice projection angle constant.

Claims

1. the measurement digital display device of a crevice lamp microscopic crevice projection angle, mainly comprise the main shaft (1) on the slit lamp microscope base (9), crack arm (5) and micro-arm (6), the microexamination system is located on the micro-arm (6), slit lamp light source projects system is located on the crack arm (5), the vertical pivot of described micro-arm (6) is placed in outside the main shaft of being located on the base (9) (1), described crack arm (5) pivot is enclosed within outside the micro-arm (6), it is characterized in that installing one angle displacement sensor (3) between crack arm (5) and micro-arm (6), dead axle of this angle displacement sensor (3) and micro-arm are fixed on the micro-arm (6) coaxially, its moving axis and crack arm are fixed on the crack arm (5) coaxially, after the variable quantity of the crack crevice projection angle that is obtained by angle displacement sensor (3) converts the signal of telecommunication to, convert digital signal input CPU (22) to through A/D converter (21), and show by nixie display (23).

2. the measurement digital display device of crevice lamp microscopic crevice projection angle according to claim 1, it is characterized in that having a countershaft (2), the lower end of this countershaft is embedded in the micro-arm (6) and becomes one with micro-arm (6), and pivot is enclosed within on the main shaft (1), crack arm (5) pivot is enclosed within the upper end of countershaft (2), be provided with a shoulder in the axis hole of the hollow of countershaft (2), the dead axle of described angle displacement sensor (3) is fixed on this shoulder, its moving axis is fixed on the crack arm (5) by a shaft coupling (4), crack arm (5) is around countershaft (2), promptly when micro-arm (6) rotates, the corresponding rotation of moving axis of angle displacement sensor (3).

3. the measurement digital display device of crevice lamp microscopic crevice projection angle according to claim 1 and 2 is characterized in that described angle displacement sensor is made of a rotary precision potentiator.

4. the measurement digital display device of crevice lamp microscopic crevice projection angle according to claim 2 is characterized in that being provided with crack arm lock (7) between the promptly micro-arm (6) at crack arm (5) and countershaft (2), and this lock is an eccentric shaft lock.

5. the measurement digital display device of crevice lamp microscopic crevice projection angle according to claim 2 is characterized in that in countershaft (2), is provided with micro-arm lock (8) between promptly micro-arm (6) and the main shaft (1), and this lock is an eccentric shaft lock.

6. the measurement digital display device of crevice lamp microscopic crevice projection angle according to claim 1, it is characterized in that described CPU (22) by interface circuit with digital camera or/and computer be connected.