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90088262 MCS130B 

CORNERSTONE 130B MONOCHROMATORS 

29 

 

 

 

8.2 

39B

F NUMBER MATCHING 

 

The  Cornerstone  130B monochromator is an F/3.9 instrument.  Without matching the F/# of the 
incoming  light beam, stray light increases and throughput of desired signal suffers.  To illustrate 
this, the photos below show a fiber optic cable placed at the entrance of a monochromator.  Fibers  
are typically F/2.  The Oriel model 77529 may be used to match the F/# to the monochromator. 
 

 

 

Figure 20:  Mismatched F Numbers Resulting in Stray Light 

 

 

Figure 21:  F Number Matcher Used with Fiber Optic Cable 

 

 
 

Summary of Contents for Cornerstone 130B

Page 1: ...90088262MCS130B Rev B s 1 8m Monochromator Family User s Manual Cornerstone 130B...

Page 2: ...CY ANDBLAZING 22 6 3 POLARIZATION EFFECTS 24 7 MONOCHROMATOR RESOLUTION 25 7 1 DETERMINING RESOLUTION 26 8 GETTING LIGHT INTO A MONOCHROMATOR 28 8 1 ACCEPTANCE PYRAMID 28 8 2 F NUMBER MATCHING 29 9 BL...

Page 3: ...USING THE KEYPAD 65 16 3 KEY REFERENCE 66 17 APPENDIX IV GRATING PHYSICS TUTORIAL 68 17 1 THE GRATING EQUATION 68 17 2 THE GRATING EQUATION IN PRACTICE 69 17 3 GRATING ORDER 70 17 4 GRATING DISPERSION...

Page 4: ...tancePyramid of Monochromator 28 Figure 19 Grating Correctly Filled with Light 28 Figure 20 Mismatched F Numbers Resulting inStray Light 29 Figure 21 F Number Matcher Used with Fiber Optic Cable 29 Fi...

Page 5: ...tion please refer to the complete User s Manual and all other documentationprovided for additional important notes and cautionary statements regarding the use and operation of the system Do not attemp...

Page 6: ...tified as complying with all applicable European Union CE regulations and recommendations WEEE This symbol on the product or on its packaging indicates that this product must not be disposed of with r...

Page 7: ...n the manual Do not remove the cover for normal usage 1 3 20BELECTRICAL HAZARDS Make all connections to or from the instrument with the power off The Cornerstone B requires DC voltage for operation wh...

Page 8: ...ith a stream of dry clean air or nitrogen Wiping the grating surface will cause permanent damage Avoid getting any moisture or condensation onto the grating Do not breathe on or talk directly in front...

Page 9: ...tional Instruments LabVIEW are provided along with a command set and API for those wishing to develop their own programs An optional hand controller may be used for quick access to all common commands...

Page 10: ...n top of true signal will depend on many experimental factors as well as the performance of the instrument When comparing stray light specifications it is important to compare values that were measure...

Page 11: ...r to extract small signal levels from background radiation All components shown are available from Newport Figure 3 Tunable Monochromatic Light Source Figure 4 Monochromator with Lock In Digital Ampli...

Page 12: ...s carefully packaged tominimize the possibility of damage during shipment Inspect the shipping box for external signs of damage or mishandling Inspect the contents for damage If any item is missing or...

Page 13: ...130B monochromator to an arc lamp or quartz tungsten halogen light source This kit is compatible with Oriel s Research Lamp Housings which hold 50 to 250 watt lamps It includes a base plate a flexible...

Page 14: ...nts or the regional sales representative for Newport ELECTRICAL SHOCK Never attempt to open the lamp power supply or monochromator power adapter These items do not contain any user serviceable parts F...

Page 15: ...l 70040 are included with each Cornerstone 130B If using a commercially available USB GPIB or USB RS232 converter cable the driver for this cable must be installed before communication to the monochro...

Page 16: ...de the monochromator When the monochromator switches between diffraction gratings the changing angle of the grating causes light to be diffracted at various wavelengths This includes white light which...

Page 17: ...lacedwith other slit sizes Fixed slits are a low cost alternative to micrometer adjustable slits and provide excellent repeatability They are a good choice when only a few slit sizes are required Fixe...

Page 18: ...ning dial Another set of numbers are located on the shaft When the zeroes in both these locations line up the slit is fully closed Turning the dial clockwiseadvances the dial position further down on...

Page 19: ...RS 19 The slit height is continuously adjustable Pull the lever out for the shortest height Push the slide in for the tallest height setting Figure 11 Shortest Micrometer Adjustable Slit Height Figure...

Page 20: ...be chosen while performing a scan over a range of wavelengths The Cornerstone 130B monochromators feature diffraction gratings produced by Richardson Gratings Both Oriel Instruments and Richardson Gr...

Page 21: ...grooves caused by minor defects in the ruling machine resulting in anomalous readings or ghosts Holographic gratings do not suffer from ghosts so interpretation of line spectra is simplified The signa...

Page 22: ...ength The choice of an optimal efficiency curve for a grating depends on the specific application Often the desired instrumental efficiency is linear that is the intensity of light transformed into si...

Page 23: ...ONE 130B MONOCHROMATORS 23 Figure 15 Grating Efficiency Curves for CS130B Monochromator Pre Configured Models High Resolution Configuration Holographic GratingConfiguration ExtendedRangeConfiguration...

Page 24: ...for optics where the plane of incidence rather than the grooves are used to define parallel and perpendicular The graphs for the Cornerstone 130B configurations have one efficiency curve per grating...

Page 25: ...density is halved the dispersion is doubled A monochromator mechanism can only tilt the grating through a limited range of angles The angle and groove density determine the transmitted wavelength The...

Page 26: ...hromator recalibrated annually by a qualified service technician Calculation of Resolution Basedon Fixed Slit Selection Fixed Slit Slit Width Grating 1 Grating 2 Grating 1 Grating 2 High Resolution Co...

Page 27: ...9 nm 77216 600 m 6 6 nm 6 4 nm 6 4 nm 12 7nm 77215 760 m 8 4 nm 8 1 nm 8 1 nm 16 1nm 77214 1 24mm 13 6nm 13 1nm 13 1nm 26 3nm 77213 1 56mm 17 2nm 16 5nm 16 5nm 33 1nm 77212 3 16mm 34 8nm 33 5nm 33 5nm...

Page 28: ...ramid often described by an F The position and dimensions of the internal optics determines the pyramid The optical equivalent is a grating image located behind the slit as shown in below Only light t...

Page 29: ...ht beam stray light increases and throughput of desired signal suffers To illustrate this the photos below show a fiber optic cable placed at the entrance of a monochromator Fibers are typically F 2 T...

Page 30: ...ether order sorting or blocking filtersare needed 9 1 40BORDER SORTING FILTERS For meaningful spectral measurements care should be taken to remove unwanted orders of radiation particularly if the inpu...

Page 31: ...order diffraction The filter wheel can be mounted to the male flanges of the monochromator slits or slit holders The filters are mounted external to the monochromator Thus the refractive index and thi...

Page 32: ...90088262 MCS130B CORNERSTONE 130B MONOCHROMATORS 32 Figure 23 Model 74010 Filter Wheel...

Page 33: ...trument and filter wheel accessory The utility software provided with the monochromator includes USB drivers for Windows 7 or 10 32 bit and 64 bit operating systems as well as Mac OS The software can...

Page 34: ...sue such as defense facilities and universities There is no need to memorize commands or key sequences The 24 keys are clearly labeled with functions like Shutter Go Wave and Filter The display provid...

Page 35: ...ious detection instruments such as theNewport Optical Power and Energy Meters 1918 R 1936 R and 2936 R plus Oriel s LIDA SRS KIT Software prompts guide users through the measurement process Instrument...

Page 36: ...cedure it is necessary to use a light source with a known spectral line appearing within the operating range of the grating Oriel offers a number of pencil calibration lamps for this purpose such as t...

Page 37: ...ch this first spectral line peak appears 8 Use the STEP command tomove the grating position until the second spectral line is visible at the output 9 Note the wavelength at which this second spectral...

Page 38: ...move It should be held in place using a free hand by grasping or pressing down on the grating holder 8 Carefully uncover the new grating to be installed and set aside 9 Use the cover from the new grat...

Page 39: ...90088262 MCS130B CORNERSTONE 130B MONOCHROMATORS 39 Figure 27 Grating Platform without Gratings Figure 28 Grating Platform with GratingsInstalled...

Page 40: ...nochromator comes with calibration parameters which are stored in a file on the memory stick shipped with the instrument If these parameters were corrupted from possibly performing an incorrect field...

Page 41: ...nm step rate 24 nm s at 10 nm step rate MotorizedFilter Wheel Compatibility Models USFW 100 74010 Apex2 filter wheel Utility Software Requirements Windows 10 and MAC OS X Windows XP compatible softwa...

Page 42: ...90088262 MCS130B CORNERSTONE 130B MONOCHROMATORS 42 14 13BDIMENSIONS Figure 30 Cornerstone 130B Dimensions...

Page 43: ...90088262 MCS130B CORNERSTONE 130B MONOCHROMATORS 43 Figure 31 74001 Micrometer Adjustable Slit Dimensions Figure 32 77294 Fixed Slit Dimensions...

Page 44: ...90088262 MCS130B CORNERSTONE 130B MONOCHROMATORS 44 Figure 33 Model 74006 Mounting Plate...

Page 45: ...onfigure it according to the following settings Baud Rate 9600 Data Bits 8 Parity None Stop Bits 1 Flow Control None The CS130B requires all Statements to be terminated by a carriage return followed b...

Page 46: ...r end You should see some negative voltage between pin 3 and pin 5 and close to 0V between pin 2 and pin 5 The CS130B receives on pin 3 device Rx and transmits on pin 2 device Tx The PC transmits to t...

Page 47: ...o Parameters Some Statements require a parameter separated from the command by at least one space Numeric parameters can be strings representingeither integers or floating point numbers Some commands...

Page 48: ...ry After sending a Query the application must read back both the echo and the answer Example RS 232 echo on Send WAVE cr lf Response WAVE cr lf 500 01 cr lf Example RS 232 echo off Send WAVE cr lf Res...

Page 49: ...the USB port the CS130B sends no echo and no other response to a command Example USB Send GOWAVE 500 cr lf Response none Queries If Echo is enabled the CS130B echoes every character it receives on the...

Page 50: ...FSET HANDSHAKE 0 1 SEQ HANDSHAKE INFO SHUTTER O C OVL SHUTTER SHUTTER STB SLOWSTEP value OVL STEP value OVL STEP UP DOWN SHIFT STEP UP DOWN STEP STEPSIZE value SEQ STEPSIZE UNITS text SEQ UNITS SHIFT...

Page 51: ...offset for the grating and saves it accordingly A calibration procedure is outlined elsewhere in this manual Parameter The actual wavelength at the output Example calibrate 587 1 assuming the units ar...

Page 52: ...d FILTER SET Purpose Query the current filter wheel position setting Example Filter set E g response 4 indicates filter 4 is the current selection Command FILTER1LABEL Purpose Set a label for filter 1...

Page 53: ...resenting the desired wavelength in the currently selected wavelength units Example gowave 877 679 rotates the grating to the 877 679nm location assuming units are nm Example gowave 546 rotates the gr...

Page 54: ...se 1 the currently selected grating is number 1 Command GRAT1FACTOR Purpose Set the calibration multiplier for grating 1 Parameter A floating point number Example Grat1factor 1 1 set the cal factor fo...

Page 55: ...loating point number Example grat1offset 2 1 set the cal offset for grating 1 to 2 1 Default 0 0 Command GRAT1OFFSET Purpose Query grating 1 s line calibration offset setting Example grat1offset E g r...

Page 56: ...d INFO Purpose Query for basic instrument information The response is Oriel Instruments Model 74000 Cornerstone 130 SNXXX V VV where XXX is the unit s serial number and V VV is the version number for...

Page 57: ...mple shutter c close the shutter Default 0 closed Command SHUTTER Purpose Query the shutter setting Response is O or C Example shutter E g response C the shutter is closed Command STB Purpose Query th...

Page 58: ...ckly step the stage 10000 steps clockwise Example step 500 quickly step the stage 500 steps counterclockwise Command STEPSIZE Purpose Set the number of steps to take when a step or slowstep command is...

Page 59: ...nm Command UNITS Purpose Query wavelength units Example units E g response um units are microns Command VERSION Purpose Query the CS130B firmware version Example version E g response 2 01 version is 2...

Page 60: ...l operations are complete See the section in this Appendix entitled Command Synchronization Example OPC Command OPC Purpose The CS130B will respond with the value 1 when all operations are complete Se...

Page 61: ...and wait until it receives a response then it will know that all pending operations are complete For example Send wavelength command e g gowave 585 Send opc and wait for response Read detector If an...

Page 62: ...ing the ERROR query The CS130B sends the value of the Error Code and then resets the value to 0 Error code Cause 0 No error 1 Command not understood 2 Bad parameter used in command 3 Destination posit...

Page 63: ...Command string too long max 64 characters 220 Parameter Error General parameter error e g shutter 7 222 Data Out Of Range Numeric parameter value too large to store 224 Illegal Parameter Value Parame...

Page 64: ...90088262 MCS130B CORNERSTONE 130B MONOCHROMATORS 64 502 Filter Wheel Fault Hardware failure filter wheel not operating properly 504 Filter Halted Filter command during firmware upgrade...

Page 65: ...THE HAND CONTROLLER With the Hand Controller connected turn on power to the Cornerstone Some CS130B system information is briefly displayed including serial number and firmware version Press the LOCA...

Page 66: ...on is disabled on this model SHIFT BAND This function is disabled on this model GRAT Press this key to move to another grating position Press GRAT then press either 1 or 2 on the numeric keypad and fi...

Page 67: ...directly above FILTER provides access to the filter label These labels are eight character alphanumeric fields used for information only You can use the keypad to type any number then press ENTER to a...

Page 68: ...on adjacent grooves at angle I to the grating normal are shown Consider light at angle D to the grating normal this light originates from the A and B rays as they strike the grating The path differenc...

Page 69: ...r and exit slit fix the output direction Only wavelengths that satisfy the grating equation pass through the exit slit The remainder of the light is scattered and absorbed inside the monochromator As...

Page 70: ...e and order are zero and the light is simply being reflected If the grating angle is positive then the order is positive m 1 if the grating angle is negative then the order is negative m 1 The half an...

Page 71: ...d width of the grating Normally the smallest slit available and optical aberrations rather than the grating determine the attainable resolution As an example a monochromator in this case Oriel s MS257...

Page 72: ...ces worldwide Every year the Newport Resource catalog is hailed as the premier sourcebook for those in need of advanced technology products and services It is available by mail request or through Newp...

Page 73: ...uthorization RMA number must be obtained prior to shipment to Newport This RMA number must appear on both the shipping container and the package documents Return the product to Newport freight prepaid...

Page 74: ...ed at Buyer s expense to Newport s facility provided that Buyer notifies Newport in writing promptly after discovery of the defect or nonconformity and within the Warranty Period Products may only be...

Page 75: ...contain tradesecrets of Newport and are for use only in the manner expressly permitted Newport claimsand reservesall rightsand benefitsafford ed under law in the Programsprovided by Newport Corporati...

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