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Telecentric lenses for the inspection of microplates
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Microplates are widely employed in the life sciences and biomedical industries. As automation has become the leitmotif with Industry 4.0 trend, machine vision has extended its application range in these fields, including the inspection of microplates. Due to their peculiar shape, the inspection of microplates requires a view that is not affected by perspective, thus telecentric lenses are the ideal choice.
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Telecentric lenses are the perfect solution for the inspection of microplates, widely employed in the life science and biomedical industries.
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Telecentric lenses for the inspection of microplates
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Introduction

A microplate, also known as microwell plate, is a flat plate with multiple "wells" used as small test tubes. Microplates have become standard tools in analytical research and clinical diagnostic testing laboratories. Although several configurations are possible, microplates are typically arranged in a 2:3 rectangular matrix with 6, 12, 24, 48, 96, 384 or 1536 sample wells (see Figure 1).

Figure 1: microplates with 24 wells.
Figure 1: microplates with 24 wells.

The application

Microplates are characterized by multiple wells arranged in rectangular matrix that can be quite large in many cases. Most plate readers provide a top-down inspection of the samples, thus relatively large fields of view are often required. At the same time, perspective must be considered when choosing the right optics, as common fixed focal length lenses may produce blind spots at bottom of the wells (see Figure 2). For this reason, telecentric lenses are the preferred solution for this type of application.

Figure 2: fixed focal length lenses vs telecentric lenses for microplates inspection.
Figure 2: fixed focal length lenses vs telecentric lenses for microplates inspection.

Why Opto Engineering®?

Whether you chose a more “traditional” approach using smaller lenses with a handling system or a more innovative one with ultra-compact optics, Opto Engineering® has a complete range of products to answer all your needs. With two decades of experience in the field of machine vision, Opto Engineering® is the ideal partner for machine vision applications in every industrial sector, including the life science and biomedical ones.