Horizontal Digital Video Comparators HDV Series


The HDV Horizontal Digital Video Comparators combine the best features of a horizontal optical comparator and a vision metrology system. With a rigid steel design, they are configured like a traditional horizontal comparator. The workstage is the same as the Starrett field-proven HB400 and HD400 comparators, with a 110lb (50kg) load capacity. The heart of the system centers on a uniquely designed interchangeable lens mounting system coupled to a hi-resolution color digital video camera (patent pending). The system is available with a choice of seven telecentric lenses for micron-level resolution and optical distortion as low as 0.001% for accurate field-of-view (FOV) measurements. Lenses provide a maximum FOV of up to 2.44" x 1.85" (62mm x 47mm). Stage movement can be related to the imported file allowing part comparison up to 16" (400mm) long.

The HDV systems house a powerful 64-bit PC, which runs MetLogix™ M3 measuring software. With M3 software, DXF CAD files can be imported and 2D Go/No-Go digital overlays can be developed directly from the CAD files. Video edge detection (VED), allows real-time interaction of the imported file with the video image of the part being inspected. Productivity, speed and accuracy are all enhanced. Systems are available in manual or CNC control.


  • Steel construction with hard anodized stage tooling plate
  • 21.3" x 5.1" (540 x 130mm) workstage
  • 110lbs (50kg) maximum load capacity
  • 2" (51mm) of focus travel
  • Helix adjustment with ±15° Vernier scale
  • Manual X-Y and focus positioning via hand wheels or CNC with joystick and trackball positioning
  • Heidenhain glass scales for 0.5μm (.00002") X and Y resolution
  • LED illumination for surface and profile lighting
  • 5 mega-pixel color camera (2448 x 2058 pixels)
  • Ultra-low distortion to 0.001% for telecentric FOV measurements
  • 64-bit Intel® processor
  • Windows® 7 Professional operating system
  • MetLogix™ M3 software with DXF/FOV option pack
  • Software and part image displayed on 24" (60cm) touchscreen color monitor (1920 x 1080 pixels)