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Gatan UltraScan 894, Руководство пользователя

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A2 

Description 

 

 
 

 

UltraScan Use

r

’s Guide Reference Series Rev 1.0 

II 

FireWire capability 

 

A2  Description  

 

An UltraScan

TM

 

Reference

 Series camera acquires an electron microscope 

image into a computer in four stages.  First a scintillator converts the electron 
image into a high-resolution light image. Then a fused fiber-optic plate captures 
the light from each point in the image and channels it to the CCD.  The CCD 
then converts the transferred light image into a second electron image.  Finally, 
the CCD shifts that image charge row by row to the low-noise output amplifier, 
readout electronics and digitizer.   

Sensitivity is achieved by maintaining high efficiency at each stage of the 
image signal chain:  light generation in the scintillator, optical coupling by the 
fiber optic plate, image detection by the CCD pixel and also by cooling and 
low-noise readout.  Resolution is achieved by minimizing light scatter in the 
scintillator and light leakage amongst fibers in the fiber optic plate and by 
optimized proximity focus at the end of the fiber plate through ultra-thin 
bonding technology.  In addition, since the signal chain contains no moving or 
flexible parts the detection efficiency has very high stability over time.  These 
techniques together constitute the HCR

TM

 technology, which is at the heart of 

the UltraScan

TM

 family. 

Figure A1 shows the placement of an UltraScan

TM

 

Reference

 Series camera on 

a TEM column. The camera is mounted below the viewing and film chamber.  
The camera controller shown in Figure  A2 (front panel view) and Figure  A7 
(back panel view) and an image-acquisition computer are linked to the camera 
by supplied cables. Compressed air for controlling the camera insertion and 
retraction is taken from the microscope as is the cooling water. 

Содержание UltraScan 894

Страница 1: ...UltraScan User s Guide Reference Series Gatan Inc 5933 Coronado Lane Pleasanton CA 94588 Tel 925 463 0200 FAX 925 463 0204 January 2003 895 MANUAL Revision 1 0...

Страница 2: ...software and prepare for the acquisition of an image Gain Normalization and Magnification Calibration Chapter 3 Image Acquisition shows the user the most often used floating windows in DigitalMicrogra...

Страница 3: ...ms any implied warranties of merchantability or fitness for a particular purpose Gatan Inc further reserves the right to revise this manual and to make changes to its contents at any time without obli...

Страница 4: ...contact by electronic mail Gatan USA West Coast Tel 925 463 0200 Fax 925 463 0204 Gatan USA East Coast Tel 724 776 5260 Fax 724 776 3360 Gatan Germany Tel 089 352 374 Fax 089 359 1642 Gatan UK Tel 018...

Страница 5: ...CAMERA CONFIGURATION 2 3 2 3 SET BIAS LEVELS 2 4 2 4 QUADRANT CORRECTION REFERENCE 2 6 2 5 GAIN NORMALIZATION 2 6 2 6 MAGNIFICATION CALIBRATION 2 7 2 6 1 Low magnification 2 8 2 6 2 High magnification...

Страница 6: ...N ASKED QUESTIONS 5 4 APPENDIX 1 I HARDWARE DESCRIPTION I A1 SYSTEM REQUIREMENTS I A2 DESCRIPTION II A2 1 FRONT PANEL CONTROLS IV A2 2 CONTROLLER S BACK PANEL VI A3 INSTALLATION IX A3 1 Pressure lines...

Страница 7: ...5 CALIBRATION WINDOW 2 13 FIGURE 3 1 IMAGE WINDOW 3 2 FIGURE 3 2 FOCUS LOUPE 3 3 FIGURE 3 3 IMAGE INFO 3 3 FIGURE 3 4 CAMERA ACQUIRE WINDOW 3 4 FIGURE 3 5 SAVING WINDOW 3 4 FIGURE 3 6 SAVING SET UPWIN...

Страница 8: ...ted High Contrast Resolution HCR optical technology HCR technology results in images with higher resolution and higher contrast than images acquired with traditional optics and takes digital imaging r...

Страница 9: ...sure the water and the three color coded pressure lines are correctly connected to the camera and proper water pressure is maintained Switch on the CCD camera controller Fig 2 1 the LED will turn gree...

Страница 10: ...lace When DigitalMicrograph is launched you will see the commonly used tools left side the Image Acquisition and Saving tools right side and the Result window as shown in Figure 2 1 These tools are co...

Страница 11: ...2 2 Camera Configuration If the camera is already configured by a Gatan service engineer this section can be ignored Before starting acquiring images it is necessary to configure the camera This proc...

Страница 12: ...he following r0 8 r4088 4095 c0 8 c4088 4095 r and c indicates row and c olumns respectively corrects for the 8 pixels wide edge which does not contain active CCD pixels in the case of the UltraScan 4...

Страница 13: ...Controller This will remove the majority of the image contrast from quadrant to quadrant in an evenly illuminated flat field image and maximize the dynamic range The Set Bias Levels should be run befo...

Страница 14: ...is stored in DigitalMicrograph Reference Images folder for later use Typically it is not required to run this routine frequently It is important to run Gain normalization routine next section after Pr...

Страница 15: ...samples At Low magnifications Use cross grating sample or any sample having known spacing At High magnifications Use graphite or any crystalline samples having known lattice spacing Use the FFT method...

Страница 16: ...2 8 Figure 2 5 Global Microscope Info window Figure 2 6 Microscope menu In the Magnification section in the Global Microscope Info window Figure 2 4 choose Source from User Ask User Always Click OK 2...

Страница 17: ...he on screen instructions Figure 2 8 Figure 2 8 Instructions window A red line will appear on the image Position it on a feature of known size Press OK on the Calibrate image window Enter the correct...

Страница 18: ...igure 2 9 to complete the magnification calibration Figure 2 10 Choose YES to complete the calibration The calibration can be checked on the calibration table containing pairs of value the nominal mic...

Страница 19: ...n represents the nominal TEM magnification and the second column is the actual magnification at the CCD 2 6 2 High magnification Record a lattice image of the crystalline sample Figure 2 12 Figure 2 1...

Страница 20: ...ollow the on screen instructions Figure 2 14 A red line will appear on the diffractogram Position the endpoints of the red line on two symmetrical diffraction peaks Figure 2 13 Press OK to specify the...

Страница 21: ...Magnification Calibration UltraScan User s Guide Reference Series Rev 1 0 2 13 Figure 2 15 Calibration window...

Страница 22: ...cus mode displays a continuous image at higher resolution than the Search image Fine adjustment of focus setting can be done with this operation mode In addition there is another way to adjust the ima...

Страница 23: ...to respectively double or halves the exposure time To view a continuous image of the sample Select the Camera insertedbox or make sure it is selected Setup Search mode Press Start Viewto start the im...

Страница 24: ...or Pressing the Spacebar 3 2 Image Notes The user can type in notes in the Image Info window shown in Figure 3 3 Saving an image will automatically save the image notes with the image file The Up down...

Страница 25: ...cord the final image click on the Start Acquire button in the Camera Acquire palette shown in Figure 3 4 This mode is preset to acquire a full resolution CCD image As explained previously it is recomm...

Страница 26: ...6 click on the Browse button Select or create a directory for saving images 3 5 2 Construct Image File Name In the File Name Options field specify the way you want the image file name to be constructe...

Страница 27: ...Rev 1 0 3 6 Figure 3 7 Saving Data Bar Custom item allows user to add text information to every report page This feature is useful to add the name of your institution or the name of your TEM lab Click...

Страница 28: ...ered in the window of the Single line item Click OK The style of the Custom item can be easily changed in the Report page next section 3 5 4 Report The report button the one with a page and a magnifie...

Страница 29: ...style to make it more visible First position it on the Report page and then choose the font and size of your liking Click 3 5 5 Printing dimensions Digital images can not be magnified indefinitely sin...

Страница 30: ...Image Saving and Printing UltraScan User s Guide Reference Series Rev 1 0 3 9 Figure 3 10 Control palette...

Страница 31: ...it is recommended waiting 2 hours or more for the system to stabilize Flip the shutter switch to AUTO Turn the computer on if it is not on yet and double click in the DigitalMicrograph icon to launch...

Страница 32: ...e 3 1 to check the final focus Make sure Auto Surveyis checked Click on Start Acquire button in the Image Acquire palette Figure 3 4 disable Auto Exposure Click on Report View button on the Saving win...

Страница 33: ...h is illuminated when an over temperature condition is detected The first light controller monitors the temperature of the Peltier heat sink If the temperature exceeds 50 C an automatic protection wil...

Страница 34: ...d in the viewing chamber and the CCD gate valve opens Removing large amounts of condensation will require the electronics to be switched off for about 30 minutes after the vacuum in the viewing chambe...

Страница 35: ...inated Check the scintillator for oil contamination by acquiring an image at low kV about 60 kV to put in evidence surface s contaminations If you have a clean vacuum in the camera chamber area you ma...

Страница 36: ...er resolution 1x binning readout mode does not make full use of the full range of the output amplifier because of the smaller pixel size The US4000 saturates at roughly 1 3 of the full digitization ra...

Страница 37: ...are noisy what can I do Try increasing the exposure or current density of the beam 7 My images are slowly deteriorating what should I do Determine if the CCD is warming up Check the temperature displa...

Страница 38: ...ntrolled by the CCD camera software In order to protect the CCD the software default setting shutter normally closed closes the TEM shutter if the CCD is not set to acquire any images In this case one...

Страница 39: ...series CCD cameras the following hardware and software systems are required Windows 2000 Professional or Windows XP Professional Minimum 512 MB RAM 1GB RAM preferred 40GB 1GHz Hard drive or better Pen...

Страница 40: ...image detection by the CCD pixel and also by cooling and low noise readout Resolution is achieved by minimizing light scatter in the scintillator and light leakage amongst fibers in the fiber optic pl...

Страница 41: ...A2 Description UltraScan User s Guide Reference Series Rev 1 0 III Figure A 1 UltraScan TM Reference Series camera mounted on a TEM column Figure A 2 Controller s front panel Water line Air lines...

Страница 42: ...panel shutter control Shutter Control Figure A3 LEDs 1 and 2 indicate the state of shutters 1 and 2 respectively An illuminated LED corresponds to a shutter Open state AUTO OPEN Switch Figure A3 When...

Страница 43: ...ncy of the UltraScan camera Cool Off Warm Figure A4 Controls the camera s thermo electric cooler In the Cool mode the camera will maintain a temperature of 25 degrees Celsius The warm setting is used...

Страница 44: ...Figure A5 Fiber 1 output transmits data from the Fiber Optic Interface card mounted in the PCI bus of the computer Fiber 2 input receives data from the controller to the Fiber Optic Interface card Out...

Страница 45: ...onnections Figure A6 The microscope air line at 60 PSI is connected to the AIR IN connection located on the rear panel The camera insertion air line is connected to the AIR IN port If an inserted came...

Страница 46: ...A2 Description UltraScan User s Guide Reference Series Rev 1 0 VIII Figure A 7 Controller s back panel...

Страница 47: ...the computer anywhere that is convenient UltraScan System 1 Computer 2 TEM interface cable optional 3 Controller 4 Camera interface cable 5 Shutter interface cable 6 Camera interface cable 7 UltraScan...

Страница 48: ...Fully retracted with both the scintillator and the CCD sealed inside a separate vacuum enclosure The air kit supplied with the camera consists of three sets of tubes two per set numbered 1 through 6...

Страница 49: ...essed air line Cut the open line to the diffusion pump gate valve of the microscope s pneumatic system in two places The cuts must be made as cleanly as possible They can be made anywhere along the Op...

Страница 50: ...the film chamber Follow the instructions given by the microscope manufacturer Inspect the o ring seal to the microscope for dust and fibers The seal must be clean in order to maintain the vacuum If n...

Страница 51: ...e T to the two ends of the hose Cut the water chiller hose that runs from the microscope to the water chiller The cut must be made after any pressure regulation or flow restriction in the microscope p...

Страница 52: ...a head Connect one end of line 4 to the water outlet on the camera head and the other end to line 5 to complete the loop The quick disconnect fittings automatically seal the lines off when not connect...

Страница 53: ...e electrical connections in the system Figure A 11 Electrical diagram Connect the controller to the multiple outlet strip The computer should not be plugged into the outlet strip Run the camera cable...

Страница 54: ...ler Figure A7 Connect one end of the Shutter Interface cable to the Shutter Control output on the controller Connect the other end to the Shutter Interface provided by Gatan or microscope vendor A3 6...

Страница 55: ...UltraScan User s Guide Reference Series Rev 1 0 XVII Appendix 2 CE certification...

Страница 56: ...UltraScan 1000 Model Number 895 894 CONFORMS TO THE FOLLOWING EUROPEAN DIRECTIVES Low voltage Directive 73 23 EEC EMC Directive 89 336 EEC As modified by Directive 93 68 EEC Supplementary Information...

Страница 57: ...n patterns 5 2 5 3 digital camera 1 1 2 1 DigitalMicrograph i ii 1 1 2 1 2 2 2 3 2 7 3 8 4 1 dynamic range 1 1 5 4 E exposure time 3 1 5 3 5 5 F FFT 2 7 fiber optic plate II film 1 1 2 7 5 2 5 4 5 5 5...

Страница 58: ...1 3 4 5 4 II retraction 1 1 5 5 II S saturation 5 3 5 4 Saving 2 2 3 3 3 4 3 5 3 6 3 8 4 2 scintillator 5 2 5 3 5 6 II Search mode 3 1 3 2 4 2 sensitivity 1 1 Set up 3 5 shutter 2 4 5 3 5 5 5 6 speed...

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