LAS-P-VIS-IR™

Precision Centering Station for the Alignment & Inspection of

Mid-Sized Infrared Lens Assemblies

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The LAS-P-VIS-IR™ is a mid-sized, non-contact lens alignment and inspection station designed from the ground-up for precision lens centration and tilt measurements of single element, doublet, triplet and multi-element infrared lens assemblies with radius ranging from +/- 1 mm to infinity (plano) and diameters from below 1 mm to 300 mm, including spherical, aspheric, cylindrical and parabolic surfaces. All this can be done with a single objective lens allowing for fast and easy measurement. 

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The core measurement technology is based on focused laser reflection (see LAS Technology). A single-mode optical fiber couples the external Laser Generation Module (LGM) to the on-tool vertically-mounted Optical Module (OM) which houses the focusing optics and large-format array camera(s). Software control of the LGM permits fast switching of wavelengths and optimization of the beam power, resulting in superior imaging of the reflected beam with sub-micron measurement precision. The design of the LGM permits up to two of three visible wavelengths (blue, green & red) and one infrared wavelength (SWIR, MWIR or LWIR).

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The user friendly CalcuLens™ Assembly software is standard to all LAS™ models and enables computer automated measurement of the alignment errors of a single lens for rapid bottom-up assembly. Extending the measurement to multi-element lens assemblies requires the optional CalcuLens™ Inspection software thereby adding powerful inspection capability for the quality assurance of finished lens assemblies. The recent addition of CalcuSurf-1D™ USB lever probe and profiling software to the LAS™ family of products significantly aids the ease and precision of initial setup, resulting in improved utilization during frequent lens assembly changes. 

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APPLICATIONS

• Centering of single infrared lenses

• Cementing infrared lens doublets & triplets

• Centering & bonding of multi-element infrared lens assemblies

• Alignment Inspection of infrared multi-lens assemblies (requires CalcuLens™ Inspection)

• Measurement of lens vertex height and air gaps (requires CalcuLens™ Vertex)

• Measurement of lens Radius of Curvature (requires CalcuLens™ ROC)

• Measurement of infrared lens and assembly beam deviation (requires CalcuLens™ BD)

• TIR profiling of rotationally symmetric housings and cells (requires CalcuSurf-1D™)

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SYSTEM CHARACTERISTICS

• Mid-sized, solid granite construction on rigid passive vibration isolation stand

• Measurement of small to medium diameter infrared lenses and assemblies (ø ≤ 300 mm)

• High-precision (< 50 nm runout) ø150 mm motorized & encoded rotary air bearing with integrated centration/tilt stage and vacuum through center

• Precision, motorized & encoded vertical linear stage (travel ≤ 1500 mm)

• High-power green (520 nm) laser, fiber coupled to Optical Module

• High-power MWIR (4.05 µm) quantum cascade laser, fiber coupled to Optical Module

• 90 mm Working Distance (WD) broad-band (0.4 µm – 12 µm) objective lens with quick-attach thread for accessories

• User-friendly CalcuLens™ Assembly software and data reporting functions conforming to ISO standards

• Sub-micron centration accuracy in VIS, micron centration accuracy in IR

 

AVAILABLE OPTIONS

• Add Red (660 nm) or Blue (460 nm) laser

• Replace MWIR with SWIR (1.55 µm) or LWIR (9.5 µm) laser 

• High-precision (< 50 nm runout) ø200 mm motorized & encoded rotary air bearing with integrated centration/tilt stage and vacuum through center

• Extended worktable diameters Ø200 mm – Ø300 mm 

• 20 mm, 30 mm, 40 mm, 150 mm & 200 mm WD broad-band objective lens adapters

• Glue dispensing and UV cure stations

• Reticle alignment accessory

• CalcuLens™ Inspection software for measuring alignment of multi-lens assemblies

• CalcuLens™ Vertex software for measurement of lens vertex height of tall lens assemblies and lens thickness and air space of shorter assemblies

• CalcuLens™ ROC software for measurement of lens radius of curvature

• CalcuLens™ BD software for measurement of lens boresight/beam deviation

• CalcuSurf-1D™ precision USB lever probe with digital gage and real-time profiling software 

• DMI-200 Low-coherence Distance Measurement Interferometer for center thickness and air space measurement of tall lens assemblies

• 3D-SPM Surface Profiling Module for LAS

• ROTOwand™ for vacuum lens pick-up & handling

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                                SPECIFICATIONS