Accurate size measurement of the 0.5mm crystal

To accurately measure the size of a 0.5mm crystal using advanced optical equipment, several important factors need to be taken into account. This includes the choice of appropriate telecentric lenses, the optimal backlighting system, and the lens’s depth of field. The nature of such tiny crystals, particularly their irregular shape and susceptibility to tilting, presents challenges that need to be addressed to achieve reliable measurements. In this article, we will explore how Basson’s 10x telecentric lens and its associated illumination systems can be utilized to effectively measure these minute objects with high precision.

Basson’s telecentric lenses are engineered for superior performance in various applications, including the precise inspection and measurement of small objects such as crystals. The performance of these lenses is particularly evident in surface inspection tasks, where accurate measurement of tiny crystals is critical. Crystals of such small dimensions, such as those measuring 0.5mm, are often difficult to measure due to the inherent challenges presented by their small size, irregular shapes, and the effects of lighting and reflections. Telecentric lenses, by their very design, help to overcome many of these issues, ensuring accurate and consistent measurements.

One of the most significant challenges when dealing with tiny crystals is the requirement for precise and uniform backlighting. Backlighting plays a crucial role in the visibility and clarity of the object being inspected. In the case of small crystals, the diffuse reflection is often a significant issue that can obscure the fine details of the object’s surface and dimensions. This is where Basson’s telecentric illuminators come into play. Basson’s telecentric lighting systems are designed to minimize the impact of diffuse reflections, ensuring that the light is directed in such a way that it reduces unwanted reflections and enhances the visibility of the crystal’s features. This capability is particularly useful when inspecting tiny crystals, where even small changes in lighting can affect the accuracy of the measurement.

Another important consideration when measuring such small objects is the depth of field. The depth of field refers to the range of distances within which the object being measured remains in focus. For very small objects like crystals, maintaining a consistent and sufficient depth of field is crucial for obtaining accurate measurements. Crystals are often irregularly shaped and may tilt or shift slightly during the measurement process. If the lens does not have an adequate depth of field, portions of the crystal may fall out of focus, leading to inaccurate measurements.

Basson’s STS11025110C-D telecentric lens is an ideal solution for this problem. This particular lens is engineered to offer a high depth of field, extending up to 1.28mm. For example, if a crystal has a protrusion or a recess on its surface, the large depth of field of the lens allows for the clear imaging of both the highest and the lowest points of the crystal, enabling accurate measurement of its height variations. This is particularly beneficial when working with tiny objects like crystals that are prone to slight tilting or movement. The extended depth of field ensures that the entire crystal remains in focus, even if it shifts or is slightly misaligned during the measurement process.

In addition to its impressive depth of field, the STS11025110C-D lens offers several other key features that make it particularly suitable for measuring tiny crystals. One of these is its high contrast, which ensures that even the smallest details of the crystal are visible and clearly distinguishable from the background. The lens also boasts low distortion, which is crucial for ensuring that the crystal’s true shape and size are accurately captured. Distortion, even in its smallest form, can lead to measurement inaccuracies, particularly when dealing with such small objects where every detail matters. Furthermore, the low telecentricity of the lens ensures that the image captured is as close to the true size and shape of the crystal as possible. This is especially important when precise measurements are required, as telecentric lenses are designed to minimize the effects of perspective distortion, which can occur when objects are viewed at an angle.

By combining the STS11025110C-D telecentric lens with Basson’s telecentric illuminators, an optimal solution for measuring tiny crystals is achieved. This lens can achieve accurate imaging in a smaller field of view. The small field of view is beneficial when dealing with tiny crystals as it allows for a more detailed examination of the crystal. By focusing on a smaller area, the lens can capture more fine-grained details of the crystal’s surface and structure. This is especially useful in applications where the precise measurement of small features on the crystal, such as micro-cracks or surface roughness, is required. The telecentric lens and illuminator work together to ensure that the crystal is illuminated evenly and consistently, with minimal distortion or reflection. The result is a clear, high-contrast image that allows for precise measurement of the crystal’s size and other important characteristics. This system is particularly useful in industrial and research settings, where accuracy and precision are of the utmost importance.

Moreover, the advanced imaging capabilities of Basson’s telecentric lenses allow for the measurement of the crystal’s size with exceptional accuracy, even at such small scales. The ability to measure objects with a size as small as 0.5mm requires sophisticated optical technology that can provide clear and detailed images, free from the common errors associated with traditional measurement techniques. Telecentric lenses, with their unique design, ensure that the object being measured is captured in a way that eliminates errors due to perspective distortion, making them ideal for precision measurement tasks.

In conclusion, the accurate measurement of tiny crystals, such as those with a size of 0.5mm, requires careful attention to several critical factors, including the choice of lens, the backlighting system, and the depth of field. Basson’s 10x telecentric lens, when paired with its telecentric illuminators, offers an optimal solution for overcoming the challenges presented by tiny crystals. The lens’s high contrast, low distortion, and low telecentricity, combined with its impressive depth of field, ensure that even small, irregularly shaped, or slightly tilted crystals can be measured with precision. By leveraging this advanced optical technology, it is possible to achieve reliable and accurate measurements that meet the high standards required in a variety of industrial and research applications.

Basson focuses on machine vision products used for precision measurement and defect detection.

Basson not only provides high-precision bi-telecentric lens systems, telecentric lens systems, telecentric light sources, coaxial illuminations and optical lenses, but also offers customized services.

With products designed in Germany, business planned in the UK and products made in China, Basson is able to provide superior products to customers through its global team. Currently, Basson is in preparation of production and assembly of products in Japan.

Dr. Liu Lu, acting as CTO of Basson, is a PhD degree holder of Oxford University.

Production and testing instruments include optical vacuum coating machines manufactured by Satis in Switzerland and Leybold in Germany, a laser interferometer from Zygo in the US, a spectrophotometer from PerkinElmer in the US, a spherometer from Hofbauer Optik in Germany, a centering instrument from Kyoritsu Electric in Japan, a NC grinding device made by Kojima Engineering in Japan and an automatic centering machine made by Shonan in Japan.