Calibration Targets


  • Stage Micrometers and Concentric Squares for Calibrating Distances
  • Allows for Precise Measurements of Enlarged Images

R1L1S5P

Stage Micrometer

R1L3S1P

Stage Micrometer

R3L3S3P

Concentric Square Calibration Target

Related Items


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General Specifications
Chrome Thickness 0.120 µm
Chrome Optical Density OD ≥3 at 430 nm
Substrate Thickness 0.06" (1.5 mm)
Surface Flatness ≤15 µm
Line Spacing Tolerancea ±1 µm
Line Width Tolerancea ±0.5 µm
Substrate Soda Lime Glass
  • This tolerance is valid for the mask used to create these targets and may differ minimally for the targets themselves.
Test Target
Click to Enlarge

An R3L3S3P Stage Micrometer Mounted in an XYF1 Test Target Positioner

Features

  • Horizontal Stage Micrometers with Divisions from 10 µm to 100 µm
  • Concentric Squares with Fourteen Positive Pattern Sizes from 0.1 mm to 50 mm

Thorlabs offers stage micrometers and concentric square patterns for calibrating distances in an imaging system. These targets feature soda lime glass substrates with vacuum-sputtered, low-reflectivity chrome. Each pattern is manufactured using photolithography, allowing for edge features to be resolved down to approximately 1 µm.

Mounting
These test targets can be mounted in one of four of our microscopy slide holders. Our MAX3SLH fixed slide holder provides two spring clips to mount the optic and can be mounted to any of our 3-axis flexure stages. The MAX3SLH is only compatible with test targets greater than or equal to 2" wide and provides a clear aperture of 1", which may cover the chrome pattern on some of the test targets. Thorlabs also offers our XYF1(/M) test target positioning mount (see photo above) capable of translating a 1" (25.4 mm) to 3" (76.2 mm) wide rectangular target over a 50 mm (1.97") x 30 mm (1.18") area. The mount offers five 8-32 (M4) taps for six post-mountable orientations. The XYF1 uses nylon-tipped setscrews to secure the optic. Please note that the mount's support arms overlap the optic by 4.4 mm on each side. For users of the MLS203 microscopy stage, we offer the MLS203P2 slide holder for inverted microscopes, which can mount slides 25 mm to 26.5 mm wide and petri dishes 30 mm to 60 mm in diameter.

Targets Selection Guide
Resolution Test Targets Distortion Test Targets Slant Edge MTF Resolution Test Targets Calibration Targets
Mounting Options
Mount Item # MAX3SLH XYF1 MLS203P2 FFM1 with B3C SFH2
Image
(Click to Enlarge)
Compatible Target
Item #s
R1L3S1P, R1L3S2P R1L1S5Pa, R1L3S1P,
R1L3S2P, R3L3S3P
R1L1S5P R1L1S5P,R1L3S1P,
R1L3S2P,R3L3S3P
R1L1S5P,R1L3S1P,
R1L3S2P,R3L3S3P
Features/Mounting Mounts to 3-Axis Stages
or Any with 1/4"-20 Taps
XY Translation
Ø1/2" Post Mountable
Mounts to Our MLS203-1 and
MLS203-2 Fast XY Scanning Stages
Ø1/2" Post Mountable Ø1/2" Post Mountable
  • The pattern on this target will be partially obscured by this mount.

Jason Williamson
General Manager
Thorlabs Spectral Works
Questions?
Need a Quote?
Contact Me
Customization Parameters
Substrate Sizea Min 8 mm x 8 mm (5/16" x 5/16")
Max 85 mm x 85 mm (3.35" x 3.35")
Substrate Materials Soda Lime Glass
UV Fused Silica
Quartz
Coating Material Reflective or Antireflective Chrome
Coating Optical Density >3b or >6c @ 430 nm
Minimum Pinhole/Spot Ø1 µm
Minimum Line Width 1 µm
Line Width Tolerance -0.25 / +0.50 µm
Maximum Line Density 250 lines/mm
  • Substrates can be diced to custom shapes and sizes.
  • Optical densities of >3 @ 430 nm for UV fused silica substrates and standard soda lime substrates.
  • Optical density of >6 @ 430 nm for quartz substrates and select soda lime substrates. 

Custom OEM Test Targets and Reticles

Our in-house photolithographic design and production capabilities enable us to create a range of patterned optics. We manufacture test targets, distortion grids, and reticles at our Thorlabs Spectral Works facility in Columbia, South Carolina. These components have served a wide variety of applications, being implemented in microscopes, imaging systems, and optical alignment setups.

In addition to our catalog test targets and reticles offered from stock, we can provide custom chrome patterns on soda lime, UV fused silica, or quartz substrates from 8 mm by 8 mm up to 85 mm by 85 mm. Substrates can be cut to shape for your application. Our photolithographic coating process allows us to create chrome features down to 1 µm. A few sample patterns are shown below, which can made positive or negative, as shown in the image directly below.

For a quote on custom test targets and reticles, please contact us at TSW@thorlabs.com.

Example Applications

  • Etched Reticles
  • Gray Scale Masks
  • Resolution Reticles
  • Diagnostic Reticles
  • Recreational Scopes
  • Notching Reticles
  • Eyepiece Scales
  • Illuminated Crosshairs
  • Obstruction Targets
  • Binocular Reticles

Click to Enlarge

Positive and Negative Crosshair Sample Pattern

This tab details an optimal cleaning technique developed by our engineers for cleaning reticles, test targets, distortion targets, and calibration targets.

Cleaning Procedure

  1. Use a clean wet sponge, preferably made of polyvinyl alcohol (PVA), and dish detergent to gently scrub the front and back surfaces of your reticle or target.
  2. Rinse with water.
  3. Blow dry with clean dry air, or allow the reticle or target to air dry on a clean surface.

We do not suggest using a towel, rag, or wipe to dry the surface. If contamination persists, soak the reticle or target in a detergent and water solution for 1 hour, repeating as necessary.


Posted Comments:
Stephanie G  (posted 2021-07-09 06:58:17.04)
Are these compatible with transmission illumination?
YLohia  (posted 2021-07-12 08:05:30.0)
Hello, the positive targets consist of a chrome pattern plated on to a clear substrate and are useful for front-lit and general applications. Alternatively, the negative targets (can be custom ordered by emailing your local Thorlabs Tech Support team or techsales@thorlabs.com if you are in the US) use the same chrome coating to cover the substrate, leaving the pattern itself clear, and work well in back-lit and highly illuminated applications.
Richard Krusemark  (posted 2021-06-18 11:35:59.29)
You sell this with a specific statement that the unit is "useful for the calibration of distances within imaging systems". Yet this item does not come with any sort of certificate of conformance. Are you kidding me? You can't calibrate something with a complete unknown. Now I have to find a reputable company to calibrate my standards that I just bought that have no standard. I am so glad I waisted my companies money on these. I will be sure not to return to this site for more standards.
cdolbashian  (posted 2021-06-25 09:20:35.0)
Thank you for reaching out to us at Thorlabs! Following your feedback, we are working on a version of this product which has a calibration/conformance document included. I have reached out to you directly with some more information.

Stage Micrometer, 1" x 1"

Horizontal Micrometer
Click to Enlarge

Close Up of the R1L1S5P Horizontal Scale with Crosshair
  • 1" x 1" (25.4 mm x 25.4 mm) Stage Micrometer
  • For Calibrating Eyepiece Reticles or Objective Magnification
  • 20 mm Horizontal Scale with 100 µm Divisions and Crosshair

This target features a stage micrometer pattern with 100 µm divisions and numerical labeling every 1 mm. The pattern is oriented horizontally with a 20 mm long scale and a perpendicular crosshair. The target consists of a 1" x 1" soda lime substrate with low-reflectivity, vacuum-sputtered chrome. This positive target is useful for the calibration of distances within imaging systems.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
R1L1S5P Support Documentation
R1L1S5P20 mm Stage Micrometer with 100 µm Divisions, 1" x 1", Soda Lime Glass
$133.10
5-8 Days

Stage Micrometers, 3" x 1"

Stage Micrometer
Click to Enlarge
Microscope Image of R1L3S1P Stage Micrometer
  • For Calibrating Eyepiece Reticles or Objective Magnification
  • R1L3S1P: 10 mm Scale with 50 µm Divisions
  • R1L3S2P: 1 mm Scale with 10 µm Divisions
  • Scales Centered on a 3" x 1" (76.2 mm x 25.4 mm) Microscope Slide

These targets each feature a horizontal stage micrometer pattern. The R1L3S1P micrometer has a 10 mm long scale with 50 µm divisions and numerical labeling every millimeter, while the R1L3S2P has a 1 mm long scale with 10 µm divisions and numerical labeling every 0.1 mm. Both targets consist of a 3" x 1" soda lime substrate with low-reflectivity, vacuum-sputtered chrome. These positive targets are useful for the calibration of distances within imaging systems.

R1L3S1P
Click to Enlarge
R1L3S1P Under Magnification
R1L3S2P
Click to Enlarge
R1L3S2P Under Magnification
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
R1L3S1P Support Documentation
R1L3S1P10 mm Stage Micrometer with 50 µm Divisions, 3" x 1", Soda Lime Glass
$193.70
Today
R1L3S2P Support Documentation
R1L3S2P1 mm Stage Micrometer with 10 µm Divisions, 3" x 1", Soda Lime Glass
$172.06
Today

Concentric Squares, 3" x 3"

Concentric Squares
Click to Enlarge
R3L3S3P Concentric Square Pattern
Concentric Squares
Click to Enlarge
Close Up of the Squares Smaller than 15 mm Wide on R3L3S3P Concentric Square Target
  • 3" x 3" (76.2 mm x 76.2 mm) Concentric Square Target
  • Calibrate a Measurement for Imaging Software
  • Low-Reflectivity, Vacuum-Sputtered Chrome

The R3L3S3P Concentric Square Target features fourteen concentric squares with lengths and widths ranging from 0.1 mm to 50 mm (see table below). Each square is labeled with its width on the target. This target is made from a soda lime glass substrate with low-reflectivity, vacuum-sputtered chrome. These positive targets are useful for the calibration of distances within imaging systems.

 

Widths of Positive Squares (mm)
  • 0.1 • 0.5 • 2 • 4 • 10 • 20 • 40
  • 0.25 • 1 • 3 • 5 • 15 • 30 • 50
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal Price Available
R3L3S3P Support Documentation
R3L3S3PPositive Concentric Square Test Target, 3" x 3", Soda Lime Glass
$386.31
Today