-- JoseLuisSirventBlasco - 24 Oct 2014

BWS Optical Position Sensor

<a name="Principle"> </a>

Principle

ORIGINAL SYSTEM SCHEMATIC:

Working_principle.PNG

ALTERNATIVE SYSTEM SCHEMATIC:

Schematic_Alternative_Shorter.png

<a name="Optics"> </a>

Simulations on Zemax

  • Download Simulation Files - Zemax Simulations for the focuser containing F_Silica lenses from Asphericon (A12-15FPX-S-C and A12-20FPX-S-C)
ORIGINAL SYSTEM SIMULATIONS

2014_10_Focuser_Simulation_V2Asphericon.PNG

The estimated distances with Zemax are slightly different due to calibration mismatch on "Fibre-Lens" distance.

Distance_Focuser.PNG

ALTERNATIVE SYSTEM SIMULATIONS

Mirror_Performance.PNG

Physical Views

Pieces Detail:

Focuser_Mirror.PNG

Mounted Dimensions:

Focuser_Mirror2.PNG

20141116_132422.jpg 20141116_132454.jpg 20141116_132935.jpg
     
<a name="OptoMechanics"> </a>

Optomechanics

Feedthrough.PNG Patchcord.PNG Focuser.PNG Disc.PNG
Feedthough Fibre Patchcord Focuser Optical Encoder Disc
Comp_Table.PNG <a name="OptoElectronics"> </a>

Optoelectronics

  • Laser diode links:
    • Datasheet_Laser_PL13AS001ST61-S-0.pdf - This is the used on the box, when doing the order the provider informed of this change due to stock.
    • "Regarding this order, our supplier has informed us that they are currently unable to obtain the laser diode which is required to build the PL13BN002ST71 -0-0 you ordered. As an alternative we could supply PL13AS002ST61 _S-0 at the same price. The power into the fiber will be the same and the only significant difference between the two devices is the pinout. The pinout of the PL13AS is shown in the attached drawing; could you please let me know if this is acceptable? (Please note that the drawing states the output power as 1mW, but your lasers will be set up to emit 2mW as we agreed)." Mike Hodges [m.hodges@lasercomponents.com
    • Laser Diode Order - DAI Document 5182776
    • See also: PL13/15FP Series Laser Diode Modules from Laser Components
      • From : http://www.lasercomponents.com/de-en/product/laser-diodes-with-fiber-connection-cw-and-pulsed/

TheBox.PNG Lasers_Photodiodes.PNG Comparators.PNG Circulator.PNG
The Box SMF Lasers and Photodiodes Bank of Comparators Circulator

Schematics_LD.PNG
Schematics for Laser Diode Power Control through DAC (0-1V) and Status check through ADC (0-1)

Schematics_PD.PNG
Schematics for PhotoDiode analog conditioning (for ADC sampling) and optional TTL digital outputs through comparators
List_of_OptoElectronic_Components.PNG

<a name="Processing"></a>

Signal Processing Scripts

  • Matlab GUI script - Issue BIW 483 where the needed Matlab files for the GUI and a report about it's use are hosted (2013_10).
<a name="Performance"></a>

Performance Report

TestSetUp.PNG
Set-up used on the performance tests

Performance_2.PNG Performance_1.PNG
Performance Results (Scan Region) Performance Results (Revolution-Scan Region)

Test performed on SPS Prototype

Tests with different disk samples

  • Preliminary testing performed on 21/09/2015:
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Topic revision: r4 - 2016-10-11 - unknown
 
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