Lens with double focal length with a common focal plane suitable for powerful lasers and changing the diameter of the laser spot without reinstalling the optics.
Spectral range, nm
1030 – 1100
Focal Length (f ')
Back focal length s (s' F')
1/e² diameter of input beam, mm
Clear diameter, mm
äî 3 êÂò (CW)
Single focal plane for two focal lengths of 127 and 254 mm
Optical design with diffraction-limited quality.
Change of the laser spot size by moving the inner lens without changing the entire lens to avoid dust on the optics when using.
At intermediate focal lengths - some, up to 15 mm, shift of the focal plane position, see above data for f '= 178 mm (7 ").
Compensation for thermal focal shift by moving the movable lens.
Other combinations of working magnifications are available upon request.
Mechanical design is adaptable.
Specifications are subject to change upon request.
Notification on the implementation (resumption) of activities in accordance with the amendments dated 09.05.2020 to the Decree of the Government of St. Petersburg No. 121 'On measures to counter the spread of a new coronavirus infection (COVID-19) in St. Petersburg.'
LLC 'Opto-TL' is a small innovative industrial enterprise, founded in 2002. The main activities are design, manufacturing and sales of optical products. The quality management system for the design, production and maintenance of optical products made of glass and crystals, optical systems (including lenses), optical test equipment complies with GOST ISO 9001-2015. LLC 'Opto-TL' has a compliance certificate ISO 9001-2015 Quality Management System, issued by the Certification Association 'Russian Register'.
«Opto-Technological Laboratory» Ltd (Opto-TL) is innovative production enterprise founded in 2002.
Main activity – design and manufacturing of optical products.
Quality Management System applied to development, manufacturing and service of optical components out of crystals and glasses, optical systems (including objectives), optical testing and measuring devices corresponds to GOST R ISO 9001-2015.