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---------------------------------------------------------------------------------------------- Auto Ref/Keratometer CRK-1 33

The principle of Retro-Illumination observation

3.5.1.1. Principle of retro-illumination observation

The incident lights of the infrared LED (spot light) onto the fundus of the eye are

retro-scattered from it. The scattered lights from the fundus illuminate the vitreou

s humor and some of it go through the crystalline lens and the iris. If it is captur
ed by TV camera, any turbid part of the transparent vitreous humor, lens and cor
nea can be observed.

3.5.1.2. Usage of Retro-Illumination observation

The turbid part of the cataract and the frontal glass can be

observed and the change of it can be taken up with. Therefore, the reason of the

degradation of eyesight can be known whether it is caused by the simple refractiv

e abnormality or the advance of the cataract.

n

＝

1.3375, 1.336, 1.332

Содержание CRK-1

Страница 1: ...Service Manual Auto Ref Keratometer CRK 1...

Страница 2: ...believe that the contents of this user manual are accurate in overall since they were reviewed carefully However Shanghai Huvitz does not assume any kind of res ponsibility for the latent mistake or o...

Страница 3: ...9 07 Shanghai Huvitz Co Ltd Building 1 No 150 Renjie Road Fengxian Shanghai 201401 China All rights reserved Under copyright laws this manual may not be copied in whole or in part without the prior wr...

Страница 4: ...12 3 Product Outline 14 3 1 Nomenclature 14 3 2 Optical System 18 3 3 Electrical System 22 3 4 Mode Setting 30 3 5 Principles of Measurement 31 4 Repair Standard 35 4 1 Checking and Control 35 4 2 Aut...

Страница 5: ...Assembly Procedure 68 5 1 Removing the Cover 68 5 2 Disassembling the Moving Base Assy 70 5 3 Disassembling the Front Cover Assy LCD Assy 71 5 4 Disassembling the OPTICAL HEAD ASSY 73 5 5 Disassemblin...

Страница 6: ...h Hospital Grade Type NEMA 5 15P other end with appliance coupler For use of equipment in rated voltage less than 250Vac min imum 6A Type SJT or SVT 18 3AWG 10A max 3 0m long One end terminates with b...

Страница 7: ...t this equipment and any associated accessories It is paramount that the instructio ns contained in this manual are fully understood and followed to enhance safety to the p atient and the user operato...

Страница 8: ...ored NOTE Note describes information for the installation operation or maintenance of w hich is important but hazard related if ignored Caution indicates the presence of a hazard that could result in...

Страница 9: ...dans la Communaut europ enne It indicates the safe ground point connected to the chassis of e quipment It is required to do the protective ground to the cond uctive section in the equipment of class I...

Страница 10: ...tion crasement ou insertion de la main CE Mark Marque CE CE for RoHS RoHS Directive Compliance 2011 65 EU CE pour RoHS Conformit la directive RoHS 2011 65 UE Atmospheric pressure limitation Limitation...

Страница 11: ...osed to water vapor Don t operate the equipmen t with wet hands Where the machine ca n be exposed to the c hemical or flammable s ubstances Where the machine is e xposed directly to the su nlight Plea...

Страница 12: ...o excessive sho cks or Vibrations Do not pull the plug o ut of outlet while holdi ng the cord For the normal operation of the machine please keep the ambient temperature is 10 35 humidity is 30 75 and...

Страница 13: ...2 The device should neither be kept nor installed in the place with high humidity For the optimal operation the humidity should be at the range of 30 75 The machine should not be exposed to the place...

Страница 14: ...ions are authorized to install use operate and maintain this equipment 10 User s manual or service manual should be kept in the place where the persons in charge of operation and maintenance can acces...

Страница 15: ...omenclature 1 Head Rest Preventing the vibration by fixing the head 2 Stage fixation lever for fixating stage 3 Power indicator Lamp Indicates whether or not the electric power is on 4 Display Monitor...

Страница 16: ...ns for measuring the image that is formed in the ey e retina 3 Chin rest location for placing the chin to prevent test subject from moving the f ace Chin rest paper Type B attachment part 4 Chin rest...

Страница 17: ...onnector for connecting outside device connector 3 RGB connector Connector for connecting with the outside monitor of the RGB method 4 Power switch switch for turning the power on or off 5 Clamping bo...

Страница 18: ...Auto Ref Keratometer CRK 1 17 Use signal amplifier if the distance with the outside monitor is significant...

Страница 19: ...18 Auto Ref Keratometer CRK 1 3 2 Optical System...

Страница 20: ...he Keratometry 4 1 White LED 4 2 Blue LED 5 Objective lens 6 Half mirror 7 Relay lens 8 IR filter K measurement 9 Imaging lens 10 TV camera K C 11 Half mirror 12 Reflection mirror 13 Relay lens 14 Ima...

Страница 21: ...ns to compensate refractive power 28 Imaging Lens for Refractometer Signal 29 TV camera R 30 Moving module to compensate refractive power R Refractometer K Keratometer C Color imaging Light Paths of t...

Страница 22: ...5 6 11 17 24 25 26 27 28 29 Illumination system of the light source for Retro Illume observation 23 22 21 20 19 18 17 11 6 5 1 Image capturing system of Retro Illume observation 1 5 6 7 8 9 10 Project...

Страница 23: ...22 Auto Ref Keratometer CRK 1 3 3 Electrical System Electrical construction diagram 3 3 1 1 System functional block diagram...

Страница 24: ...Auto Ref Keratometer CRK 1 23 3 3 1 2 Power input electrical block diagram AC 100 240 Power switch DPST SMPS DC Output 5V 4A 5V 2A 12V 1 8A Dual Line Fuse SMPS Output DC12V...

Страница 25: ...24 Auto Ref Keratometer CRK 1 Electrical wiring 3 3 1 3 Main Board 3 24 23 22 21 20 19 18 17 16 15 13 12 11 10 9 8 7 6 5 4 2 1 2 1 3 4 5 6 7 8 9 10 11 12 14 13 15 16 17 18 21 20 22 23 24 19...

Страница 26: ...GB OUT RGB OUT HARNESS 5 CN16 READY LED READY LED HARNESS 6 CN9 OPTIC MOVEMENT MOTOR OM MOTOR HARNESS 7 CN10 IR FILTER MOTOR IR FILTER MOTOR HARNESS 8 CN14 UART0 PORT UART HARNESS 9 CN6 UART2 PORT UAR...

Страница 27: ...S OUT CONNECTOR 17 CN15 CHART LED CHART LED BOARD 18 CN14 REF LED REF LED HARNESS 19 CN7 LCD TOUCH LCD ASSY 20 CN13 OPTIC LED MIRERING BOARD CN1 21 CN12 PRISM MOTOR PRISM BLDC MOTOR 22 CN26 KEYPAD Not...

Страница 28: ...1 27 3 3 1 5 MIRERING BOARD 3 3 1 6 Description of wire harness connection of MIRERING BO ARD Connect No Description Target connector 1 CN1 OPTIC LED INTERFACE MAIN BOARD CN13 2 CN3 FOCUS LED L FOCUS...

Страница 29: ...L LED L EXTERNAL LED BOARD 4 CN5 COLOR LED L WHITE BLUE LED HARNESS 5 CN4 COLOR LED R WHITE BLUE LED HARNESS 6 CN12 EXTERNAL LED R EXTERNAL LED BOARD 7 CN2 FOCUS LED R FOCUS LED ASSY 3 3 1 7 Picture o...

Страница 30: ...U29 XC6SLX25 2FGG484C Xillinx FPGA Logic Array 3 U32 THC63LVDF84 LVDS Receiver 4 U33 DS92LV1212A LVDS Deserializer 5 U34 ADC101S021CIMF ADC 6 U35 MDIN241 VGA Coverter 7 U22 DRV8825 STEP Motor Driver...

Страница 31: ...rn on the system with pressing button as following content of table Start Key Description Joystick Button S W Upgrade Mode Download OS program into ROM via serial port Ex COM permanently After downloa...

Страница 32: ...e that is if the ex aminee s eye is emmetropia hyperopia or myopia the reflected light from th e retina is parallel to the optic axis of the eye diverge or converge respecti vely 3 The light beam refl...

Страница 33: ...and minor axis 2b and then the rotational angle axis on the minor meridian Furthermore there is a correlation between the radius of cornea R the height of the projected ring image H which can be obtai...

Страница 34: ...some of it go through the crystalline lens and the iris If it is captur ed by TV camera any turbid part of the transparent vitreous humor lens and cor nea can be observed 3 5 1 2 Usage of Retro Illum...

Страница 35: ...34 Auto Ref Keratometer CRK 1...

Страница 36: ...ult repeatedly you can suspect internal problem In that case checking internal status at Engineer Mode can be helpful 4 1 1 Enter the Engineer Mode To enter the Engineer Mode take following steps 1 To...

Страница 37: ...l quality 1 Set any model eye on the chin rest 2 Enter the 1 1 REF TEST MODE 3 Change mode to R CCD 4 Check the quality of signal REF signal has a ring shape If there are apparent defects at the signa...

Страница 38: ...eter CRK 1 37 4 1 3 Check REF calibration data If the signal quality is not bad you can check calibration data in the second place 1 Enter the 1 2 REF DATA SETUP 2 Touch GRAPH button 3 Check the shape...

Страница 39: ...hould take a calibration again Or though the calibration data has no problem if the physical condition of the device is changed from initial status re calibration can be a solution Of course all of ou...

Страница 40: ...Keratometer CRK 1 39 2 Run calibration The number of calibration points are thirteen 30 0D 25 0D REF calibration should be taken for all of them 3 Save the result After calibration you have to save i...

Страница 41: ...40 Auto Ref Keratometer CRK 1...

Страница 42: ...in KER measurement the first thing you can check is KER s ignal quality Mire led quality can be checked with following steps 1 Touch CAPT button to capture current signal 2 Increase threshold to uppe...

Страница 43: ...42 Auto Ref Keratometer CRK 1 4 If the yellow marked area is too small and there are relatively big white areas you could increase Mire duty at SYSTEM settings to cover it...

Страница 44: ...no apparent problem you can check calibration data Checking KER calibration data is available at 1 4 KER DATA SETUP Like REF calibration data ascending or descending current is important If there are...

Страница 45: ...44 Auto Ref Keratometer CRK 1 In that case you should take a calibration again...

Страница 46: ...ndition of the device is changed from initial status re calibration can be a solution Of course all of our product release after passing strict examinations for durability and c onsistency But if is a...

Страница 47: ...us calibration The first thing you have to do is on focus calibration On focus calibration is for yellow points on KER data graph 1 Set KER 0D model eye on the chin rest and enter the KER TEST MODE 2...

Страница 48: ...Auto Ref Keratometer CRK 1 47 3 Control working distance to match HR 4 Touch SETUP button...

Страница 49: ...48 Auto Ref Keratometer CRK 1 5 Touch 0D target 6 Set real target diopter and touch START SETUP button...

Страница 50: ...Auto Ref Keratometer CRK 1 49 7 Calibration for target diopter would run automatically 8 Repeat this process to other diopters...

Страница 51: ...50 Auto Ref Keratometer CRK 1 De focus calibration De focus calibration is for these points 1 Set KER 0D model eye on the chin rest and enter the KER TEST MODE 2 Touch FOCUS button...

Страница 52: ...Auto Ref Keratometer CRK 1 51 3 Select 0D target 4 Run calibration for each points from 1 5 to 1 5 5 Repeat this to all other diopters...

Страница 53: ...52 Auto Ref Keratometer CRK 1 Save After calibration you have to save it to FRAM...

Страница 54: ...efficients to control the tr acking power Menu for tracking coefficients control is 2 2 TRACKING SETUP Bottom two items are for auto tracking Others are for joystick scrolling and they are not for you...

Страница 55: ...rt with default value 2 Test tracking performance A Move focus cross to outer mire ring edge B Leave the joystick out and watch the tracking action C If the cross passed the center of mire ring then y...

Страница 56: ...the cross stopped at the center of mire ring without passing then the test is success 3 If Step 2 is failed increase setting value and retry 4 If Step 2 is succeed current values are the answer 5 Rep...

Страница 57: ...56 Auto Ref Keratometer CRK 1 4 3 Pupil distance calibration PD Setup PD Setup is available at 3 2 PD TEST SETUP...

Страница 58: ...3 STEP The offset of the slit spacing Slit pitch Offset increases 4 STEP The offset of the slit spacing Slit pitch Offset decreases 5 EXIT PD Setup will exit Slit pitch Offset is changed the screen up...

Страница 59: ...he screen and prees joystick button 3 Move the machine optical head 4 cm to the left The focus is adjusted on the sc reen and prees joystick button 4 Move the machine optical head 1 cm to the right Th...

Страница 60: ...4 4 Factory Data Setup 1 MAKE SYSTEM BACKUP It is for our factory worker Please do not touch it 2 VERIFY BACKUP DATA Check if the valid system backup is stored 3 RESTORE SYSTEM Restore all system data...

Страница 61: ...60 Auto Ref Keratometer CRK 1 Copy backup data to another FRAM 4 5 Color Test Verify the LCD Color temperature 1 Each number on the screen is color temperature 2 Bigger number is warmer color...

Страница 62: ...Auto Ref Keratometer CRK 1 61 4 6 Touch Setup 1 Start touch setup button in the engineer mode 2 Press start button or touch LCD a few seconds 3 Press the cross marker 9 section until beep sound...

Страница 63: ...62 Auto Ref Keratometer CRK 1 4 Touch APPLY button to apply the result of calibration...

Страница 64: ...is as follows VIEW i The selected Pixel color camera and the location of the Dead Pixel is displa yed as a rectangle on the screen CLEAR i Stored information to initialize all the Dead Pixel DPC funct...

Страница 65: ...nning of the search and discovery of th e Dead Pixel count is displayed on the screen Ten thousand days When Buffer Full output with the message DPC compensation will exceed the number of po ssible De...

Страница 66: ...the engineer mode Test the each mode If Test is success or fails select pass or fail on pass and fail button 2 Menu NO DISP All of the sections disappear on the screen DISP All of the sections appear...

Страница 67: ...CRK 1 2 Start DNW program set your PC s COM port number 115200 Bps 3 Connect PC to CRK 1 with serial cable 4 Pressing the 5th key then turn on CRK 1 5 DNW program will show the following screen 6 Sele...

Страница 68: ...Auto Ref Keratometer CRK 1 67 8 After downloading turn off and on the HRK 9000A 9 Confirm the changed SW version on boot screen...

Страница 69: ...over 1 Remove the screws 10 of the Main body 1 and then separate the Head Rest A ssy 11 2 Remove the BOLTCAP and screws 2 4 and then separate Right Left Side Cove r 3 5 3 Remove the screws 8 and then...

Страница 70: ...separate the moving base front cover 5 2 Remove the screws 4 and then separate the moving base rear cover 6 3 Remove the screws 2 and then separate the optical head assy 3 4 Remove the screws 7 and t...

Страница 71: ...hen remove the joystick assy 5 Remove the set screws and then remove the gear 8 Remove the set screws and then remove the gear 9 Remove the screws 7 and then remove the y axis assy 4 Remove the screws...

Страница 72: ...er Assy LCD Assy 1 Removal Method Remove the screws 8 and then remove the main board 7 Remove the the board PC film 6 and tape Remove the screws 5 and then remove the lcd brk 4 Remove the lcd 3 Remove...

Страница 73: ...72 Auto Ref Keratometer CRK 1 2 Point for Assembly Assembly is the reverse procedure of disassembly...

Страница 74: ...sassembling the OPTICAL HEAD ASSY 1 Removal Method Remove the screws 1 and then separate the Y AXIS GUIDE PLATE 2 Remove the screws 3 and then remove the OPTIC COVER 4 2 Point for Assembly Assembly is...

Страница 75: ...and then separate the base plate 9 and bottom cover 15 Remove the screws and then separate the power brk assy 15 Remove the screws and then separate the SMPS 4 Remove the screws 11 and then separate t...

Страница 76: ...Auto Ref Keratometer CRK 1 75...

Страница 77: ...l Voltage O K Check fuse in the bottom side Take off the head cover 1 Check whether the cable from SMPS to Main Board is inserted well 2 Check the voltage 12V of connector b y using DMM CN1 Pin No 6 1...

Страница 78: ...RK 1 77 Take off the head cover Check whether the cable from Mainboard t o LCD is inserted well Mainboard CN18 No Connection is OK Make correct connection Yes External LCD is O K Replace the Mainboard...

Страница 79: ...spec ially end of paper Take off the cover 1 Check whether the cable from Mainboard to LCD is inserted well 2 When pressing the button check whethe r the voltage goes to L level Default is H igh Does...

Страница 80: ...paper is not fed correctly Take off the head cover Unconnect the cable from mainboard to the thermal printer board Connect new printer module to mainboard then execute printing again No Printing OK R...

Страница 81: ...Auto Ref Keratometer CRK 1 Phenomenon 6 Cannot see the eye fixation target Take off the head cover Take off the optic cover Check whether led is out Is LED out Replace Mainboard Replace LED board No Y...

Страница 82: ...ng bright spot i s some that out focused Enter into REF TEST MODE in engineer mode Enter into CCD mode 1 Check Ring image is correct 2 Defocus very slightly until showing som e other light we call it...

Страница 83: ...tion There is also another method called accommodation paralysis method Me chanic myopia occurs more easily in the case of the youth Additionally the accommodati on of eye is one of the functions of t...

Страница 84: ...ens of glasses western people 3 Cylinder Form There are three kinds of cylinder form A form displaying the data using minor meridian Refraction power of the minor meridian is displayed as SPH and the...

Страница 85: ...in User Setup Mode 4 Axis Axis is expressed counterclockwise from the ear side of the left eye as the origin shown in the figure below 5 Pupil Distance PD Pupillary distance PD is the distance betwee...

Страница 86: ...n PRINT EYE ON in t he Page 3 4 of the SETUP MODE See the following table and diagram for further infor mation Classification of Data NORMAL MYOPIA HYPE ROPIA ASTIGM ATISM NORMAL 0 5 S 0 5 0 5 C 0 0 M...

Страница 87: ...TISM 0 5 S C Eyeball Output by REF Measurement a EMMETROPIA NORMAL e MIXED ASTIGMATISM b MYOPIA NEAR SIGHTEDNESS f HYPEROPIA FAR SIGHTEDNESS c SIMPLE MYOPIC ASTIGMATISM g SIMPLE HYPEROPIC ASTIGMATIS M...

Страница 88: ...Auto Ref Keratometer CRK 1 87 MATISM Diagram of the eye ball output by REF Measurement...

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