The Vision & Control catalog offers a selection of large-field lenses that provide customers with a wide range of applications and also represent the showcase of this technology and quality. The latest members of this product family are the vicotar® TL230 and TL380 telecentric widefield lenses, with object field diagonals of 230 mm and 380 mm respectively, and vicotar® TLL400 and TLL520 line scan lenses. In the OEM service we currently realize fields of view up to 600 mm as well as camera connections for larger sensor formats, such as M42 and M72.
Why wide-field lenses?
Due to their technical design, they are particularly suitable for the telecentric, monochrome inspection of large objects, test objects with deep contours or passages, magazined parts as well as assembly and placement inspection.
The wide-field lenses with Fresnel technology can be used for monochromatic image processing in the VIS and NIR spectral range. All lenses are available with or without various filter elements.
The most significant advantage of telecentric wide-field lenses from Vision & Control - they are considerably shorter and lighter than comparable glass lenses. Telecentric large field lenses achieve previously unattainable fields of view with telecentric imaging.
The advantage of telecentric lenses, i.e. perspective-free imaging, has so far been offset by the disadvantage that they are severely restricted in their use due to limited field of view sizes and are also expensive. Due to the principle of using the parallel main beam path for imaging, the front lens must be larger than the object to be examined.
As a result of this fact, the larger the parts, the greater the manufacturing effort required to produce the optical components of telecentric lenses from glass, which is reflected in their price. Lenses of this type are also heavy, long and mechanically sensitive.
This is precisely where our considerations for telecentric wide-field lenses come in. If the glass front lens is replaced by a very finely structured plastic stepped lens (e.g. 10 zones / mm), it is possible to achieve significantly larger fields of view with telecentric lenses. The use of Fresnel lenses improves the diameter-to-mass ratio and the diameter-to-length ratio enormously. In this way, telecentric lenses with diameters of up to 600 mm are currently possible.
Another new development are vicotar® telecentric wide-field lenses for line scan camera applications:
TLL400 and TLL520.
A special and space-saving variant of our wide-field lenses are the line scan lenses specially developed for line scan camera applications. Here, too, we have a selection of products available as standard; the variants for customer-specific adaptation to the object field and camera connection are very diverse. As an OEM service, we can adapt your customized wide-field lens and deliver it comparatively quickly.
Despite their size, vicotar® telecentric large field lenses are designed for industrial use.Stable mountings ensure low-vibration installation.The dust-protected design, adjustable and fixable aperture and scratch-resistant front screen enable use even under unfavorable conditions.
The standard lenses have a C-mount camera connection.