Star pattern test tool

Please Wait. The negative targets use the same chrome coating to cover the substrates, leaving the patterns clear. This tolerance is valid for the mask used to create these targets and may differ minimally for the targets themselves. Click to Enlarge Line pairs help measure how well a camera can distinguish two objects from one another. Example Line Sets. Click to Enlarge Spectral Curves of Reflective Test Targets The large difference between the uncoated blue line and AR-coated chrome red line in the visible region means that the positive reflective targets have high contrast between the pattern and the background.

Need a Quote? Sample Patterns Click to Enlarge. Click to Enlarge. Cleaning Procedure 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.

Rinse with water. Blow dry with clean dry air, or allow the reticle or target to air dry on a clean surface. Please Give Us Your Feedback.

First Name. Last Name Submit Anonymously:. Contact Me:. Prefer to Request a Quote? Request Quote. Enter Comments Below:. Submit Feedback:. Click for a new code. I need the precise values of the lines in this target. Is this the full diameter of 3 lines, or is this the periodic length full diameter of 2 lines, a negative and a positive one A drawing with the values in the PDF would be very helpful. Thank you for reaching out to Thorlabs.

I would need to contact your technical department to ask some questions about the features of the items that we need. Thank you Fidel. Thank you for contacting us here at Thorlabs! We apologize deeply for our lack of communication. We have reached out to you directly to discuss your custom.

To be able to precisely navigate around the elements on this target, I ordered a XYF1 mount. Upon receipt, I now realize that the 18mm x 18mm target cannot easily be mounted in the XYF1 without covering much of the target elements.

What is the recommended method of mounting these R1L1S1P targets? Thank you for reaching out to us here at Thorlabs! The test target you have selected is intended for use with a standard microscopy system, rather than free space optics.

Because this is the case, using it with the XYF1 may result in the obscuration of some of the edges of the test pattern, due to the size of the target. I have reached out to you directly with alternative solutions. We are always hungry for feedback, so we appreciate you bringing this incompatibility of seemingly-compatible parts to our attention.

I am interested in resolution and distortion targets, could you send to me quotations? Hello, thank you for your interest in our products. Quotes can be requested by contacting our Sales Team sales thorlabs.

What is methodology to clean the target? Is there any documentation? What is the surface flatness of the target? Hello, thank you for contacting Thorlabs. Unfortunately, we don't have specific documentation on cleaning the R1L1S1N. I have reached out to you directly to discuss your request. Thank you for contacting Thorlabs.

An applications engineer from our team in China techsupport-cn thorlabs. I will reach out to you directly. Is this retardation a retardation between the entire target and the patterned area? I'd like to know the retardation between the entire target and the patterned area. The R2L2S1B is a half wave plate for nm or nm nm. The entire target has the same retardance, the pattern is created by having a 45 deg azimuth difference against the background.

What would you recommend? Thank you. Our Chrome on Glass targets are suitable for all wavelengths mentioned by you. I have reached out to you directly to gain a better sense of your needs. How thick is the patterned chrome on R1L1S1P test target? It's very important point to test axial resolution of our equipment. The thickness of the chrome layer on our targets is 0. More information can be found in the specs table in the Overview tab.

For our porpoises we need to use both fundamental nm and second harmonic nm laser light. In order to evaluate the use of the R2L2S1B Birefringent NBS A Resolution Target for our application I need to know the total optical path length of the target at the two wavelength nm and nm and for both ordinary and extraordinary polarization orientation. Looking forwrd for your reply I thank you for the attention.

Hello Fernando, thank you for contacting Thorlabs. The design wavelength for half-wave retardance for the R2L2S1B is nm.

The liquid crystal delta n is 0. Unfortunately, we do not have the data for your exact operating wavelengths. We reached out to you directly to discuss this further. Hello, thank you for your feedback!

We are in the process of discussing the possibility of publishing this information on our website. I want to know resolution target patterns specification of Night vision devices. I have reached out to you directly to discuss your application in more detail. Could you please provide me the refractive index of the liquid crystal polymer layer aligned in the target, please?

Also, could you please provide the information about the material of this liquid crystal polymer layer? Thanks in advance. Unfortunately, we cannot disclose this information since it is proprietary.

I am interested in ordering this target but I have the following question: My understanding is that the target is made out of Chrome coating on Soda Lime Glass. This, due to a given illumination system will result in shadows on the rear side, correct? Is it possible to have this target on a non-transparent glass?

Please send me a Quote by E-mail. You are correct if using the positive resolution targets then light incident on the front of the target light will reflect off of the chrome patterns. The negative targets have clear patterns with chrome coating the rest of the substrate which makes these intended for back lit applications. We can provide custom targets with non-transparent substrate such as opal.

I will reach out to you directly to discuss our custom target capabilities. I would be very interested on them. Let me know. I will contact you directly about our custom capabilities. It'd be helpful to draw what "line pair" is on the website, like Figure 1 b in the following link. Response from Tim at Thorlabs: Thank you for your feedback.

We will look into adding a diagram explaining line pairs and camera resolution soon. I wish to use a blue laser nm to get the resolution. In the masks that you use, will it transmit blue light? I would prefer it to be a quartz substrate.

Ted Morse Prof. Hello Ted, thank you for contacting Thorlabs. I am checking on the transmission and reflection of the chrome and soda lime in UV regions now. I will contact you directly when I have more information. Once the pattern is defined, we chemically etch the substrates to produce the finished targets.

Although similar in performance with the mask, we do not provide NIST traceable certificates. I will contact you shortly to provide information in getting targets with NIST certificates.

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