BWS Optical Position Sensor

• Principle
• Simulations on Zemax
• OptoMechanics
• OptoElectronics
• Signal Processing Scripts
• Performance Report

Principle

ORIGINAL SYSTEM SCHEMATIC:

• Download Physical System Scheme - MS Visio 2010 File

ALTERNATIVE SYSTEM SCHEMATIC:

• Download Alternative Physical System Scheme- MS Visio 2010 File

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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)

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

ALTERNATIVE SYSTEM SIMULATIONS

Physical Views

Pieces Detail:

Mounted Dimensions:

Optomechanics

• List of Optomechanical Components - Excel file with the table shown bellow.
• Components orders and Quotations - Issue BIW-508 where last component orders and quotations (2014_10) are summarized.

Feedthough	Fibre Patchcord	Focuser	Optical Encoder Disc

Optoelectronics

• Specifications and Functional Blocks - Issue BIWS-402 where the specifications document and a schematic functional block can be found, some Pspice simulations from the circuits are reported as well.
• List of Optoelectronic Components - Excel file with the table shown bellow

• 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/

• Photodiode links:
  • Datasheet_Photodiode_PTIN155ST83-N-O.pdf
  • Photodiode Order - DAI Document 4922799

• Optical Glass Disks:
  • Disks V1 Order (SPS)
  • Disks V2 Order (SPS)
  • Disks V3 Order (PSB)

The Box	SMF Lasers and Photodiodes	Bank of Comparators	Circulator

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

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

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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).

Performance Report

• Assembly and Performance tests done on Prototype (2014_03_03): PowerPoint Version, PDF Version.

Set-up used on the performance tests

Performance Results (Scan Region)	Performance Results (Revolution-Scan Region)

Test performed on SPS Prototype

• Laboratory testings before Installation on SPS Tunnel

Tests with different disk samples

• Preliminary testing performed on 21/09/2015: