SPECIFICATIONS
  • standard objectives
  • standard flatfield objectives
  • Ultra-Plan objectives
  • fluorescence microscopy objectives
  • phase-contrast objectives
  • long working-distance objectives
  • polarising microscopy objectives
  • special widespectral objectives
  • special macro objectives for criminalistic microscopes
  • special objectives for CCD and CMOS cameras


    Polarising microscopy objectives

    These microscope objectives are new designs intended for middle-series production. They combine a reasonable price with improved flat-field performance and are excellent for widefield views in microscopic research in mineralogy, defectology etc..

    transmitted and reflected light
    parfocal distance (DIN or RMS), mm 45 or 33
    tube length , mm 160 or infinity

    Some specifications:
    optimum field of view (in eyepiece), mm 18
    maximum field of view (in eyepiece), mm 20
    N MAGNIFICATION NUMERICAL APERTURE TOTAL WORKING DISTANCE, mm TYPE OF ABERRATION CORRECTION
    1 2.5 0.04 30.0 PLANACHROMAT
    2 5 0.10 25.0 PLANACHROMAT
    3 10 0.25 3.8 ACHROMAT
    4 20 0.40 0.58 ACHROMAT
    5 40 0.65 0.64 ACHROMAT
    6 50 1.00 OIL 0.32 ACHROMAT
    7 63 0.85 0.55 ACHROMAT
    8 63 1.15 WATER 0.40 ACHROMAT
    9 63 1.25 OIL 0.28 ACHROMAT
    10 100 1.20 WATER 0.32 ACHROMAT
    11 100 1.25 OIL 0.30 ACHROMAT


    Some specifications:
    optimum field of view (in eyepiece), mm 20
    maximum field of view (in eyepiece), mm 22.5
    N MAGNIFICATION NUMERICAL APERTURE TOTAL WORKING DISTANCE, mm TYPE OF ABERRATION CORRECTION
    1 2.5 0.05 11.5 ICS PLANACHROMAT
    2 5.0 0.10 16.7 ICS PLANACHROMAT
    3 10.0 0.25 12.4 ICS PLANACHROMAT
    4 10.0 0.25 OIL 0.8 ICS PLANACHROMAT
    5 20 0.45 1.2 ICS STIGMACHROMAT
    6 20 0.45 OIL 0.5 ICS STIGMACHROMAT
    7 40 0.65 0.5 ICS STIGMACHROMAT
    8 40 0.65 OIL 0.36 ICS STIGMACHROMAT
    9 63 0.85 0.35 ICS STIGMACHROMAT
    10 100 0.90 0.17 ICS PLANACHROMAT
    11 100 1.25 OIL 0.31 ICS STIGMACHROMAT

    Some optical diagrams of objectives showing the designs developed by our specialists.





FOCUS Inc.
1B, 5-th Upper street, Saint-Petersbourgh 194292, Russia
Phone:             +7-812-7154960          Phone/Fax:     +7-812-9328906
E-mail:              focus@focusinc.ru