Thorlabs Inc.
Visit the Fluorescing and Liquid Crystal Alignment Disks page for pricing and availability information

Fluorescing and Liquid Crystal Alignment Disks

  • Visualize Wavelengths from UV to MIR
  • Central Hole or Target Aids Alignment
  • Available Unmounted, with SM1 or RMS Threads, or Attached to a Cage-Mountable Plate

VRC6SCPT

MIR Alignment Plate

VRC1SM1

SM1 UV/Visible Alignment Disk

VRC4D05

Ø1/2" IR Disk

VRC2D1

Ø1" Visible/IR Disk

VRC4CPT

Placed in a 30 mm
Cage System

Hide Overview

OVERVIEW

Features

  • Ø10.0 mm, Ø1/2", and Ø1" Disks for Visible to MIR Alignment
  • Four Materials Available:
    • UV/Visible Fluorescing Material (250 - 540 nm)
    • Visible/IR Fluorescing Material (400 - 640 nm and 800 - 1700 nm)
    • IR Fluorescing Material (790 - 840 nm, 870 - 1070 nm, and 1500 - 1590 nm)
    • MIR Thermochromic Liquid Crystal Material (1500 to >13,200 nm)

Our alignment disks are made from either fluorescing or liquid crystal material to aid the alignment of ultraviolet (UV) to mid-infrared (MIR) beams. The graphs below detail the absorption and emission bands of our fluorescing disks, which are made of the same materials as those used in our laser viewing cards. We offer these Ø1/2" or Ø1" disks unmounted, SM1-threaded (1.035"-40), RMS-threaded (0.800"-36), or mounted to a drop-in cage plate. Our unmounted and cage-plate-mounted disks feature a centered Ø1.5 mm through hole, while the threaded disks have an alignment target. Alternatively, our Ø10.0 mm MIR liquid crystal alignment disk is available mounted to a drop-in cage plate.


Hide Specs

SPECS

Item # Operating Wavelength Range(s)
(Click for Graph)
Emission Band Active Region Mounting Alignment Feature Requires Charging
VRC1SM1 250 - 540 nm 450 to 750 nm Ø0.79"
(Ø20 mm)
External SM1 (1.035"-40) Threading Target Guide Lines
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
No
VRC2D05 400 - 640 nm,
800 - 1700 nm
~580 to 750 nm Ø1/2"
(Ø12.7 mm)
Ø1/2" Unmounted Ø1.5 mm Hole in VIS/IR Disk Center Yes
VRC2RMS Ø0.7"
(Ø18 mm)
External RMS (0.800"-36) Threading Target Guide Lines
 Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC2SM1 Ø0.79"
(Ø20 mm)
External SM1 (1.035"-40) Threading Target Guide Lines
 Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC2D1 Ø1"
(Ø25.4 mm)
Ø1" Unmounted Ø1.5 mm Hole in VIS/IR Disk Center
VRC4D05 790 - 840 nm,
870 - 1070 nm,
1500 - 1590 nm
~520 to 580 nm Ø1/2"
(Ø12.7 mm)
Ø1/2" Unmounted Ø1.5 mm Hole in IR Disk Center No
VRC4CPT Ø1/2"
(Ø12.7 mm)
Ø1/2" Disk Mounted on
Drop-In Cage Plate
Ø1 mm Hole in Plate
Ø1.5 mm Hole in IR Disk Center
VRC4SM1 Ø0.79"
(Ø20 mm
External SM1 (1.035"-40) Threading Target Guide Lines
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC4D1 Ø1"
(Ø25.4 mm)
Ø1" Unmounted Ø1.5 mm Hole in IR Disk Center
VRC6SCPTa 1.5 to >13.2 µm N/A Ø0.39"
(Ø10.0 mm)
Ø10.0 mm Disk Mounted on
Drop-In Cage Plate
Ø1 mm Hole in Plate
Ø2.0 mm Hole in Disk Center
No
  • Minimum Detectable Power Density: 0.05 W/mm2 @ 1550 nm (22 °C)

Hide Selection Guide

SELECTION GUIDE

Alignment Disk and Laser Viewing Card Selection Guide
(Click
Representative
Drawing for Details;
Not to Scale)

Wavelengths Ø1/2” Unmounted Disk Ø1” Unmounted Disk Threaded Disk Cage-Plate-Mounted Disk Viewing Cards
250 - 540 nm - - VRC1SM1
(SM1 Threading)
- VRC1
400 - 640 nm
800 - 1700 nm
VRC2D05 VRC2D1 VRC2RMS
(RMS Threading)
- VRC2
VRC2SM1
(SM1 Threading)
700 - 1400 nm - - - - VRC5
790 - 840 nm,
870 - 1070 nm,
1500 to 1590 nm
VRC4D05 VRC4D1 VRC4SM1
(SM1 Threading)
VRC4CPT VRC4
1500 - >13,200 nm - - - VRC6SCPT VRC6S


Hide UV/Visible Fluorescing Alignment Disk

UV/Visible Fluorescing Alignment Disk


Click to Enlarge

Absorption and Emission Bands for the VRC1SM1
  • Absorption Band: 250 - 540 nm
  • Does Not Require Charging
  • Centered Target Aids Alignment
  • Externally SM1 (1.035"-40) Threaded

This alignment disk is designed to simplify the alignment of UV and visible beams. It is made from the same slow-fading phosphor material as our VRC1 laser viewing card and features a target that clearly marks the optical axis of any setup. The back of the disk features external SM1 (1.035"-40) threading for compatibility with our Ø1" lens tubes and optic mounts.

Item # Absorption Band Emission Band Active Region  Mounting Alignment Feature Requires Charging
VRC1SM1 250 - 540 nm 450 to 750 nm Ø0.79" (Ø20 mm) External SM1 (1.035"-40) Threading Target Guide Lines,
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
No

Part Number
Description
Price
Availability
VRC1SM1
SM1-Threaded UV and Visible Alignment Disk (250 - 540 nm)
$80.50
Today

Hide Visible/IR Fluorescing Alignment Disks

Visible/IR Fluorescing Alignment Disks


Click to Enlarge

Absorption and Emission Bands for the VRC2 Alignment Disks
  • Absorption Bands: 400 - 640 nm and 800 - 1700 nm
  • Requires Charging by Visible Light
  • Ø1/2" or Ø1" Unmounted, or SM1 Threaded

These alignment disks are designed to simplify the alignment of visible and IR beams. They are made from the same slow-fading phosphor material as our VRC2 laser viewing card. Ø1/2" and Ø1" unmounted versions are available. Alternatively, we offer alignment disks with external RMS (0.800"-36) or SM1 (1.035"-40) threading for compatibility with an RMS-threaded microscope objective lens or an SM1 lens tube system, respectively.

Item # Absorption Bands Emission Band Active Region  Mounting Alignment Feature Requires Charging
VRC2D05 400 - 640 nm,
 800 - 1700 nm
~580 to 750 nm Ø1/2" (Ø12.7 mm) Ø1/2" Unmounted Ø1.5 mm Hole in Disk Center Yes
VRC2RMS Ø0.7" (Ø18 mm) External RMS (0.800"-36) Threading Target Guide Lines,
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC2SM1 Ø0.79" (20 mm) External SM1 (1.035"-40) Threading Target Guide Lines,
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC2D1 Ø1" (Ø25.4 mm) Ø1" Unmounted Ø1.5 mm Hole in Disk Center

Part Number
Description
Price
Availability
VRC2D05
Ø1/2" Visible and IR Alignment Disk (400 - 640, 800 - 1700 nm)
$21.50
Today
VRC2RMS
RMS-Threaded Visible and IR Alignment Disk (400 - 640 nm, 800 - 1700 nm)
$84.25
Today
VRC2D1
Ø1" Visible and IR Alignment Disk (400 - 640, 800 - 1700 nm)
$34.25
Today
VRC2SM1
SM1-Threaded Visible and IR Alignment Disk (400 - 640 nm, 800 - 1700 nm)
$80.50
Today

Hide IR Fluorescing Alignment Disks

IR Fluorescing Alignment Disks


Click to Enlarge

Absorption and Emission Bands for the VRC4 Alignment Disks
Back View of VRC4CPT
Click to Enlarge
Back View of VRC4CPT in a 30 mm Cage System
  • Absorption Bands: 790 - 840 nm, 870 - 1070 nm, and 1500 - 1590 nm
  • Does Not Require Charging
  • Ø1/2" or Ø1" Unmounted, SM1 Threaded, or Cage Plate Mounted

These alignment disks are designed to simplify the alignment of IR beams. They are made from the same slow-fading phosphor material as our VRC4 laser viewing card. Ø1/2" and Ø1" unmounted disks are available, as well as a mounted disk with external SM1 (1.035"-40) threading on one side for compatibility with our Ø1" lens tubes.

The VRC4CPT features an alignment disk mounted on a drop-in cage plate for quickly aligning a beam in a 30 mm cage system. The back side of the plate features a laser-engraved alignment target with four concentric circles with 4 mm, 7 mm, 10 mm, and 13 mm diameters, as shown in the photo to the right.

Item # Absorption Bands Emission Band Active Region  Mounting Alignment Feature Requires Charging
VRC4D05 790 - 840 nm,
 870 - 1070 nm,
 1500 - 1590 nm
~520 to 580 nm Ø1/2" (Ø12.7 mm) Ø1/2" Unmounted Ø1.5 mm Hole in Disk Center No
VRC4CPT Ø1/2" (Ø12.7 mm) Ø1/2" Mounted on Drop-In Cage Plate Ø1 mm Hole in Plate
Ø1.5 mm Hole in Disk Center
VRC4SM1 Ø0.79" (Ø20 mm) External SM1 (1.035"-40) Threading Target Guide Lines,
Ø3 mm and Ø9 mm Concentric Circles
(±0.22 mm Concentricity)
VRC4D1 Ø1" (Ø25.4 mm) Ø1" Unmounted Ø1.5 mm Hole in Disk Center

Part Number
Description
Price
Availability
VRC4D05
Ø1/2" Alignment Disk, S,C, & L Bands (790 - 840, 870 - 1070, 1500 - 1590 nm)
$21.50
Today
VRC4CPT
30 mm Cage System Alignment Plate with IR Disk (790 - 840 nm, 870 - 1070 nm, 1500 - 1590 nm)
$30.25
Today
VRC4SM1
SM1-Threaded IR Alignment Disk (790 - 840 nm, 870 - 1070 nm, 1500 - 1590 nm)
$80.50
Today
VRC4D1
Ø1" Alignment Disk, S,C, & L Bands (790 - 840, 870 - 1070, 1500 - 1590 nm)
$34.25
Today

Hide MIR Thermochromic Liquid Crystal Alignment Disk

MIR Thermochromic Liquid Crystal Alignment Disk

Back View of VRC6CPT
Click to Enlarge

Back View of VRC6SCPT in a 30 mm Cage System
  • Ø10.0 mm Liquid Crystal Film Changes Color When Exposed to Mid-Infrared (MIR) Light
  • Does Not Require Charging
  • Ø1 mm Central Through Hole Allows Partial Beam Transmission for Alignment
  • Minimum Detectable Power Density: 0.05 mW/mm2 @ 1550 nm (22 °C)
  • Ambient Operating Temperature: 20 to 24 °C
  • Ambient Temperature for Peak Sensitivity and Visibility: 22 °C
  • Use with Our 30 mm Cage Components

The VRC6SCPT Cage-Plate-Mounted MIR Alignment Disk consists of a Ø10.0 mm MIR alignment disk that is made of the same material as our VRC6S Detector Card and has been tested with laser sources of wavelengths ranging from 1.5 µm to 13.2 µm. This disk is adhered to an anodized aluminum cage alignment plate and positioned such that its Ø2.0 mm central hole is concentric with the plate's Ø1 mm hole and aligned with the exact center of a 30 mm cage system. The back side of the plate features a laser-engraved alignment target with four concentric circles with 4 mm, 7 mm, 10 mm, and 13 mm diameters (see photo to the right).

The recommended ambient temperature range for this card is 20 to 24 °C, with peak sensitivity and responsivity at an ambient temperature of 22 °C. The detector area is black below approximately 23 °C and turns blue/violet around 28 °C whether heated by laser exposure or increased ambient temperature. The responsivity will be reduced when used at an ambient temperature below 20 °C since the material will require more time for the area exposed to the laser to reach a temperature above 23 °C, and the card will exhibit lower sensitivity above 24 °C since the color contrast between the laser-exposed region and the rest of the active region will be reduced.

Please Note: The spot size on the disk will vary depending on power density. See the Laser Viewing Cards presentation for more information.

Item # Wavelength Range Minimum Detectable Power Density Active Region Alignment Feature Requires Charging
VRC6SCPT 1.5 to >13.2 µm 0.05 mW/mm2 @ 1550 nm (22 °C) Ø0.39" (Ø10.0 mm) Ø1 mm Hole in Plate
Ø2.0 mm Hole in Disk Center
No

Part Number
Description
Price
Availability
VRC6SCPT
30 mm Cage System Alignment Plate with MIR Disk, 1.5 to >13.2 µm
$36.00
Today