THORLABS LCC1620A User Manual
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THORLABS LCC1620A User Manual

Liquid crystal shutters
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LCC1620A(/M) &
LCC1622(/M) &
LCC1623(/M)
Liquid Crystal
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User Guide

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Summary of Contents for THORLABS LCC1620A

  • Page 1 LCC1620A(/M) & LCC1622(/M) & LCC1623(/M) Liquid Crystal Shutters User Guide...

  • Page 2: Table Of Contents

    Specifications and Graphs ....... 8 5.1.2 Shutter Timing Specifications ........10 Chapter 6 Mechanical Drawings ........26 Chapter 7 Maintenance ..........28 Chapter 8 CE Certification ..........29 Chapter 9 Regulatory ............ 30 Chapter 10 Thorlabs Worldwide Contacts ....... 32...

  • Page 3: Chapter 1 Safety

    Liquid Crystal Shutters Chapter 1: Safety Chapter 1 Safety Do Not Open Housing! The Liquid Crystal Shutter has no user-serviceable parts. Service should only be performed by trained service personnel. All statements regarding safety of operation and technical data in the instruction manual will only apply when the unit is operated correctly.

  • Page 4: Chapter 2 Product Overview

    Chapter 2: Product Overview Chapter 2 Product Overview Thorlabs’ Liquid Crystal Shutters are precision, high speed shutters that are ideal as a laser switch. They consist of a Liquid Crystal (LC) cell, an electronic controller unit, and a mechanical housing, shown below in Figure 1.
  • Page 5 Shipping List • LCC1620A(/M), LCC1622(/M), or LCC1623(/M) Liquid Crystal Shutter and Variable Attenuator DS12 12 VDC / 4 A Power Supply with Region Specific Power •...

  • Page 6: Chapter 3 Setup

    Additionally, the liquid crystal shutters are designed to be compatible with Thorlabs 30 mm cage systems. The four #4-40 holes on the front of the shutter can also be used to mount the shutter in either a horizontal or vertical orientation using the Thorlabs Cage System.
  • Page 7 Liquid Crystal Shutters Chapter 3: Setup Figure 3 Liquid Crystal Shutter Rev. B, February 6, 2023 Page 5...

  • Page 8: Chapter 4 Operation

    Liquid Crystal Shutters Chapter 4: Operation Chapter 4 Operation Ensure that the input beam is linearly polarized and that the • polarization axis is aligned with the marking on the front of the shutter. A polarizer or waveplate can be used to ensure the polarization axis is aligned to the shutter.
  • Page 9 Liquid Crystal Shutters Chapter 4: Operation Note: under “ATTENUATOR” mode, if the potentiometer is not turned clockwise fully, the “EXT INPUT” voltage will not achieve full transmission. Instead it can vary from off to the attenuation level set by the potentiometer. Figure 4 Top View of the Shutter Rev.

  • Page 10: Chapter 5 Specifications And Graphs

    Liquid Crystal Shutters Chapter 5: Specifications and Graphs Chapter 5 Specifications and Graphs Specifications Item # LCC1620A(/M) LCC1622(/M) LCC1623(/M) Operating 420 – 700 – 1050 – Wavelength Range 700 nm 1100 nm 1700 nm Transmission >60% >80% (Avg.) Contrast Ratio 8000:1 >7300:1...
  • Page 11 Liquid Crystal Shutters Chapter 5: Specifications and Graphs AC Power 100 – 240 VAC Requirements Two 8-32 (M4) Threaded Holes for Post Mounting Mounting 30 mm Cage System Compatible Internal SM1 Threads, Ø1” Lens Tube Compatible Operating 15 °C to 60 °C Temperature Dimensions 60 mm x 60 mm x 27 mm...

  • Page 12: Shutter Timing Specifications

    Liquid Crystal Shutters Chapter 5: Specifications and Graphs 5.1.2 Shutter Timing Specifications LCC1620A(/M) Time (Typ.) (ms) Diagram Description 25 °C 40 °C 60 °C Delay between the input pulse’s rising A→B edge at 90% and the 0.065 0.061 0.052 initialization of shutter...
  • Page 13 Liquid Crystal Shutters Chapter 5: Specifications and Graphs LCC1622(/M) Time (Typ.) (ms) Diagram Description 25 °C 40 °C 60 °C Delay between the input pulse’s rising A→B edge at 90% and the 0.256 0.142 0.098 initialization of shutter down to 90% Falling edge from 90% B→C 0.112...
  • Page 14 Liquid Crystal Shutters Chapter 5: Specifications and Graphs LCC1623(/M) Time (Typ.) (ms) Diagram Description 25 °C 40 °C 60 °C Delay between the input pulse’s rising A→B edge at 90% and the 0.52 0.39 0.24 initialization of shutter down to 90% Falling edge from 90% B→C 0.39...
  • Page 15 Liquid Crystal Shutters Chapter 5: Specifications and Graphs Figure 5 Timing of the TTL pulse (top) and the shutter response (bottom) Rev. B, February 6, 2023 Page 13...
  • Page 16 750 nm 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Attenuation Voltage (V) Figure 6 Typical LCC1620A(/M) Shutter Transmission by EXT Input (0 – 5 V) for Multiple Voltages and Wavelengths under “ATTENUATOR MODE” Page 14 CTN018794-D02...
  • Page 17 Liquid Crystal Shutters Chapter 5: Specifications and Graphs LCC1622(/M) Transmission vs. Wavelength 1000 1100 1200 Wavelength (nm) 0.5 V 1.5 V 2.5 V 3.5 V 4.5 V LCC1622(/M) Transmission vs. Voltage 700 nm 750 nm 800 nm 850 nm 900 nm 950 nm 1000 nm 1050 nm...
  • Page 18 Liquid Crystal Shutters Chapter 5: Specifications and Graphs LCC1623(/M) Transmission vs. Wavelength 1050 1200 1350 1500 1650 1800 Wavelength (nm) 0.5 V 1.5 V 2.5 V 3.5 V 4.5 V LCC1623(/M) Transmission vs. Voltage 900 nm 1000 nm 1100 nm 1200 nm 1300 nm 1400 nm...
  • Page 19 25 °C 40 °C 60 °C 350 400 450 500 550 600 650 700 750 800 Wavelength (nm) Figure 9 Typical LCC1620A(/M) Shutter Transmission and Contrast Ratio for Multiple Temperatures under “SHUTTER MODE” Rev. B, February 6, 2023 Page 17...
  • Page 20 Liquid Crystal Shutters Chapter 5: Specifications and Graphs LCC1622(/M) Transmission Temperature Dependence 25 °C 40 °C 60 °C 1000 1100 1200 Wavelength (nm) LCC1622(/M) Contrast Ratio Temperature Dependence 100000 10000 1000 25 °C 40 °C 60 °C 1000 1100 1200 Wavelength (nm) Figure 10 Typical LCC1622(/M) Shutter Transmission and...
  • Page 21 Liquid Crystal Shutters Chapter 5: Specifications and Graphs LCC1623(/M) Transmission Temperature Dependence 25 °C 40 °C 60 °C 1050 1200 1350 1500 1650 1800 Wavelength (nm) LCC1623(/M) Contrast Ratio Temperature Dependence 100000 10000 25 °C 40 °C 60 °C 1000 1050 1200 1350...
  • Page 22 -3° AOI 0° AOI +3° AOI +5° AOI 350 400 450 500 550 600 650 700 750 800 Wavelength (nm) Figure 12 Typical LCC1620A(/M) Shutter Transmission and Contrast Ratio for Multiple Angles of Incidence (AOI) under “SHUTTER MODE” Page 20 CTN018794-D02...
  • Page 23 Liquid Crystal Shutters Chapter 5: Specifications and Graphs LCC1622(/M) Contrast Ratio AOI Dependence 100000 10000 1000 -5° AOI -3° AOI 0° AOI +3° AOI +5° AOI 1000 1100 1200 Wavelength (nm) Figure 13 Typical LCC1622(/M) Shutter Transmission and Contrast Ratio for Multiple Angles of Incidence (AOI) under “SHUTTER MODE”...
  • Page 24 Liquid Crystal Shutters Chapter 5: Specifications and Graphs Figure 14 Typical LCC1623(/M) Shutter Transmission and Contrast Ratio for Multiple Angles of Incidence (AOI) under “SHUTTER MODE” Page 22 CTN018794-D02...
  • Page 25 Liquid Crystal Shutters Chapter 5: Specifications and Graphs LCC1620A(/M) Normalized Contrast Ratio 80 100 120 140 160 180 200 Frequency (Hz) LCC1620A(/M) Transmission and Contrast Ratio 100000 10000 1000 Transmission Contrast Ratio 350 400 450 500 550 600 650 700 750 800...
  • Page 26 Liquid Crystal Shutters Chapter 5: Specifications and Graphs LCC1622(/M) Transmission and Contrast Ratio 100000 10000 1000 Transmission Contrast Ratio 1000 1100 1200 Wavelength (nm) Figure 16 Typical LCC1622(/M) Normalized Contrast Ratio, Transmission, and Contrast Ratio, with Shaded Region Representing the Operating Wavelength Range Page 24 CTN018794-D02...
  • Page 27 Liquid Crystal Shutters Chapter 5: Specifications and Graphs LCC1623(/M) Normalized Contrast Ratio Frequency (Hz) Figure 17 Typical LCC1623(/M) Normalized Contrast Ratio, Transmission, and Contrast Ratio, with Shaded Region Representing the Operating Wavelength Range Rev. B, February 6, 2023 Page 25...

  • Page 28: Chapter 6 Mechanical Drawings

    Liquid Crystal Shutters Chapter 6: Mechanical Drawings Chapter 6 Mechanical Drawings Figure 18 Mechanical Drawing for LCC1620A, LCC1622, and LCC1623 Page 26 CTN018794-D02...
  • Page 29 Liquid Crystal Shutters Chapter 6: Mechanical Drawings Figure 19 Mechanical Drawing LCC1620A/M, LCC1622/M, and LCC1623/M Rev. B, February 6, 2023 Page 27...

  • Page 30: Chapter 7 Maintenance

    There are no serviceable parts in the shutter and the unit should not be opened by the user. If you suspect a problem with your shutter, please call Thorlabs and a member of our Technical Support team will be happy to assist you.

  • Page 31: Chapter 8 Ce Certification

    Liquid Crystal Shutters Chapter 8: CE Certification Chapter 8 CE Certification Rev. B, February 6, 2023 Page 29...

  • Page 32: Chapter 9 Regulatory

    Thorlabs or your nearest dealer for further information. Waste Treatment is Your Own Responsibility If you do not return an “end of life” unit to Thorlabs, you must hand it to a company specialized in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site.
  • Page 33 Liquid Crystal Shutters Chapter 9: Regulatory Ecological Background It is well known that WEEE pollutes the environment by releasing toxic products during decomposition. The aim of the European RoHS directive is to reduce the content of toxic substances in electronic products in the future.

  • Page 34: Chapter 10 Thorlabs Worldwide Contacts

    Liquid Crystal Shutters Chapter 10: Thorlabs Worldwide Contacts Chapter 10 Thorlabs Worldwide Contacts For technical support or sales inquiries, please visit us at for our most up-to-date contact www.thorlabs.com/contact information. USA, Canada, and South America UK and Ireland Thorlabs, Inc.
  • Page 36 www.thorlabs.com...

This manual is also suitable for:

Lcc1622Lcc1623Lcc1620a/mLcc1622/mLcc1623/m

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