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Measure Better With Borescopes | Optics and Lab Equipment

Measure Better With Borescopes

Last Updated: 20.10.19


Working with borescopes involves some degree of attention, and there may be things you can do to obtain better results. If you want a list of recommendations for this purpose, check it out here. We will focus on the various ways of increasing the outcome you expect when working with a borescope.

These tools are ideal for visual inspection, and, while they seem straightforward and easy to use, they may have their fair share of features. Making the best out of these features should be your primary goal, as this way, you will be able to measure better with borescopes, without a problem.



Some common pitfalls of using a borescope incorrectly

Throughout the decades since borescopes became a natural part of visual inspection routines, various methods have appeared. The main issue with these methods is that they are not always clear, especially for someone who hasn’t been trained. That could lead to confusion and inaccurate measurements.

Sometimes, it is improper use that causes the inaccuracies to appear. Lack of training is, again, a common cause. To prevent such pitfalls, there are certain things people can do to work correctly with such an instrument.

Shadow measurements, as this is all about, use specific measurement tips so that the operator can establish the correct values when a shadow projects on a target. That helps with measuring the target, and there are video borescopes that deal mainly with this aspect. Also, the processor inside the borescope will use triangulation for better measurements.

What operators must know, first and foremost, is how to place the borescope in such a manner that the measurement tips are where they’re supposed to be.


Some tips for accurate shadow measurements

Now that you know how essential it is to get proper measurements, start with this step. The measurement tip must be close to the surface, but that without causing difficulties for observing the entire object that must be measured.

As the shadow moves, the videoscope will also move closer. This way, any inaccuracies from poorly positioning the measurement tip will be avoided.

There can be some troubles with the tip being too close. That could make the image to come out of focus. As a borescope can be used for detecting scars and cracks, it needs to give a clear idea on the depth or height of such indents in the surface with great accuracy.

When that happens, make sure that you position the tip close enough that you can notice the shadow breaking. That’s where the difference of depth occurs, and this simple step will ensure the accuracy of your measurements.

Notice the shadow. It should be straight up and down, as you can observe it on your display. That means that it is perfectly perpendicular on the objective lens, thus ensuring that you will be able to register precise measurements.

Another thing to bear in mind is that the shadow should be on the same plane with whatever it is that you’re measuring. This way, you will avoid any mishaps and inaccuracies in your work.



How to use rigid borescope with high-speed cameras

Borescopes that can be outfitted with high-speed cameras are convenient, but they also pose some issues in regards to precise measurements. Let’s talk a little about rigid borescopes that you can hook with this type of cameras.

There is a reason why it is desirable to work with the rigid type of tool when you use such cameras. You won’t get too much of a shaky camera movement when using it, and the camera will catch everything with the utmost accuracy and efficiency.

For visual inspection of various machinery, as well as rotating components, nothing beats this combination. By hooking up the two elements, you will create a system that will let you see clearly inside complex engines and the like.

Now, you should know that rigid models come in various lengths and diameters. Some even have a specific direction of view. All these aspects count when you want to pick the right tool for the application you have in mind.

For accurate measurements, you need to make sure that the borescope you chose comes with a tube that is long enough for accessing the part of the engine, or the pipe, or anything else you need to examine and record with the high-speed camera.

Also, you will need a borescope with a large diameter. This way, you ensure that the camera can catch as much as possible of what the borescope can direct its optical device toward.

Now, here is another thing you must do. You should pick the right direction of view. 0-degree view models are used for examining areas that are in front of the tool, without any deviations. For side views, you need a 90-degree model.


A few things on automotive borescopes and their applications

Using a borescope in automotive applications is nothing unusual. There are many tasks you can achieve with its help. For instance, you can examine engine castings, gearboxes, and even entire vehicles. Any equipment that falls in this category can use this type of inspection for detecting defects and other issues.

Because you don’t have to dismantle large machinery to identify possible issues, a borescope can be an indispensable tool. You can, for instance, establish the condition of internal components and check for signs of wear and tear.

Also, you can use a borescope to see the source of component failure, as well as to observe possible corrosion and rust. There are several significant parts of a vehicle that can be inspected in this manner. For instance, you can examine the condition of the clutch, by taking a close look at the lining, the springs, and the thrust bearing.

Examining the engine is ideal with the help of a borescope. You can see if the head gaskets are in good shape, as well as observe the cylinder and the valve for signs of damage. Even the body and the chassis can be examined for cracks and traces of corrosion and rust. Finally, the transmission and the differential are also on the list.



How to increase the performance of your borescope

You are, without a doubt, well aware of what borescopes can do, now that you went through the information supplied above. Videoscope operators can establish precise measurements in various ways. However, this aspect depends on how well the device they operate is manufactured. Therefore, you need to know what to choose.

One thing to bear in mind is that these borescopes come in many shapes and sizes. An articulated model will be able to offer an excellent field of view by allowing you to rotate its head and capture 360-degree images.

Another thing to know about these devices is that the diameter range goes from 4 to 8 millimeters. The longest you can find is 7.5 meters, so that’s another aspect that can influence your decision.


The working distance

This aspect is calculated by using triangulation and helps the optical system to measure the dimensions of the target object accurately. If you deal with a crack or a scar inside a pipe, the borescope must be capable of facilitating the measurement of its length, cumulative line length, depth, and so on.

Using tip adapters, as shown earlier, is the immediate measure to ensure that the borescope can be used efficiently for such tasks. Direct and side view applications will need one tip adaptor each. By getting the right tip adaptors for your borescope, you will save up some money, and you’ll also be able to prolong the lifespan of your tool.

With laser true measurement techniques, you will have, at your fingertips, just the right means to calculate data. A standard borescope that comes with a conventional optical tip will be much helped. It will work not only for measurements performed live but also for those that are stored on your device when you need to conduct some analysis.

Ideally, the borescope you use must have laser illumination. It will also help to have the system project a grid onto the area you’re working with. This will, too, help with precise measurements.

Don’t forget to train the operator so that he or she can accurately place the video cursor at the starting point for the measurements. Make sure that your operator also understands the role the resolution of the monitor plays in rendering accurate readings.



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