8° incidence
7 wavelengths 
0.01% resolution
0.1% accuracy



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This area is dedicated to product news and solutions of known issues related to exploitation of CT-7 multi wavelength reflectometer.

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016 CT7a: Practice your rotation

CT-7a inherits accuracy, stability and repeatability of CT-7, adding integrated absolute calibration of the optical path. However the  measurement repeatability and accuracy depends on repeatability of mechanical positioning of the rotating arm while it is manually rotated  between  REFERENCE and MEASUREMENT position.

It is important to check how precisely you operate the rotating arm.


015  CT7 Firmware upload

CT7 is pretty much software defined instrument:  digital signal filter, DSP, digitally controlled analog signal path. Since 2020 also LED sources current and modulation depth is software defined. 

It's quite natural that  we are continously improving the instruments' firmware.  This article explains how to  upload CT7 using CT7-Console application and firmware downoaded from CT7 support www.  

The procedure is straightforward and takes just about 1 minute.


014 Soft reflectivity calibration

Note for CT-7a.

This article concerns CT-7 using reflectivity gauge  reference- a mirror characterized in a laboratory, thus with known 'ideal' reflectivity figures. CT-7 is tuned to produce the same values on this gauge. In the contrary,  CT-7a is able to measure its own optical path, obtaining absolute by definition 100.00% reference reflectivity.


011 CT7 Export data to Excel

CT7 allows to export data in CVS format easily processed by programs like Excel.

Reading CT7 exported data, may require two simple manual action:

  1. The columns of exported data are saparated by tabulation sign "\t".  Depending on Excel settings, a manual conversion text-to-colums shall be performed.
  2. CT7   works with fixed decimal point convention:  decimal separator is a dot "." .


007. CT7 Console. Easy way to set time (and other parameters)

CT7 is fully featured and operational as a stand alone instrument. 

Nevertheless, setting parameters with joystick and a small display of handheld device, is not as confortable as  typing the values on a PC keyboard.

For this reason, beginning from version 1.00.07 of CT7-Console we have included extended parameters control ( mode Advanced and Expert).


006. CT7 installation on  Win7,8,10 system

The installation procedure for Windows 7,8,10 is simpler than ever.

In contrast to XP and Vista systems, the USB driver will be  automatically downloaded (*) and installed. The necessary  ".NET framework" is already included since Win7 .

You may use CT7 software provided with the instrument or check for updated versions from CT7 DOWNLOAD AREA.

(*) The PC shall have internet access.


005. CT7:  Windows XP and Vista installation

The installation procedure is  simple on Windows XP and Vista systems, however the USB driver shall be installed manually prior to connection of the instrument.

During the setup of CT7 Console  the  ".NET framework"  will be  automatically(*) downloaded from Microsoft and installed .

(*) The PC shall have internet access.