loading

A professional manufacturer of measuring & testing equipment.

It does not take much of a science in order to

One of the first things you need to know about witness samples, whose name is quite representative for their purposes, is that you can also find them as coating coupons. Those coupons are not necessarily freebies or purchase discounts, but rather an opportunity to take a peek at their offerings and see for yourself how the product looks, feels and acts, before you actually spend money on it.

Aside from the two names that witness samples carry, there are also two different types of samples. One is called laser grade coupon, and it defines the highest standards of evaluation and quality, while the other one is the typical coupon. The main difference between them was already suggested: with laser grades, you should get a perfect match or replica of the product.

No chips are tolerated, not even outside of the clear aperture or inside the diameter of the optical device! The other one can present such faults, provided they do not affect in any way the performance of the product.

Also important, the seller should provide you wide range of witness samples, for optical windows, coating layers and many more, targeting different specters of radiation: IR, NIR, UV - VIS, and so on. Whatever you want to preview, you should have the opportunity to receive it.

In case that the manufacturer you get in touch with does not have a sample available, he should manifest the availability to create it and deliver it to you in useful time. And this is just one of the many signs of professionalism you should be looking into. Because the surface of any glass or plastic environment that you order has to be flawless, it would not hurt for you to also ask about optical flats.

These instruments are tiny samples of well-polished glass that test how even is an optical surface. You may purchase yourself one and then use it to test the samples you receive from different providers. On the other hand, you may simply ask the person of contact and discuss with him your options for verifying products.

As a rule, pretty much that there is to find on a profile website should be accompanied, aside from the product details, by an available witness sample. The more such samples they display, the more you should look into their offerings and consider starting collaboration. After all, we are talking about transparency, a gold feature in the fields of optics, if you get the metaphor.

GET IN TOUCH WITH Us
recommended articles
200 FAQs WHAT' S NEW APPLICATION
How to keep the hydraulic universal testing machine clean



Hydraulic universal testing machines have very high accuracy requirements.
Connection of hydraulic system of tensile testing machine



The hydraulic system is the power drive mechanism of the tensile testing machine.
Application of electronic universal testing machine in automobile industry



The specific application of the electronic universal testing machine in the automobile manufacturing process: The electronic universal testing machine needs to be used for automobile parts.
Wave soldering workflow



Wave soldering refers to the molten solder (lead-tin alloy), sprayed by electric pump or electromagnetic pump into the solder wave required by the design, can also be formed by injecting nitrogen into the solder pool, so that it is pre-loaded The printed board of the component realizes the soft soldering of the mechanical and electrical connection between the solder end or the pin of the component and the pad of the printed board through the solder wave.
Protection of frequency converter of hydraulic universal testing machine



The frequency converter is a power control equipment that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply.
Common failures of electronic universal testing machine



Electronic universal testing machine is a necessary equipment to control the quality of products.
Calibration method of electronic universal testing machine



The calibration operation of the electronic universal testing machine is still relatively unfamiliar to friends who use it for the first time.
Brief introduction of selective wave soldering defects and prevention



Selective wave soldering defects and their prevention.
Some precautions when using the testing machine



Testing machine, broadly speaking, is an instrument that verifies the quality or performance of a product or material according to the design requirements before it is put into use.
How to measure the tensile force of the testing machine



The tensile force is not an accurate value after being measured by the testing machine, and subsequent calculations are required to get the desired value.
no data

  Tel: 0086-0769-2318 4144

  Mobile: 0086-137 2828 8444

no data
CONTACT US

Copyright © 2025 Sinowon | All Rights Reserved.

Customer service
detect