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Plan Infinite/Finite Biologocal Phase Contrast Objective

Plan Infinite/Finite Biologocal Phase Contrast Objective

Plan Infinite and Finite Biological Phase Contrast Objectives from Nanjing AMADA Instrument are designed for high-contrast imaging in clinical and biomedical research. These objectives provide phase contrast capability with specified numerical apertures, working distances, and field of view values. Available in magnifications from 4X to 100X, they support both infinite and finite optical systems with a 45 mm parfocal length and consistent field number of 22 or 25 mm.

  • Phase contrast imaging for transparent specimens without staining
  • Consistent 45 mm parfocal length across all models for easy switching
  • Clear distinction between infinite and finite optical systems to match microscope design
  • Precise working distances and numerical apertures for optimal resolution and depth of field
  • Field of view of 22 mm or 25 mm depending on model, suitable for standard eyepieces
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Technical features

  • Plan Infinite Biological Phase Contrast: 4XPH, 10XPH, 20XPH, 40XPH, 100XPH
  • Plan Finite Biological Phase Contrast: 4XPH, 10XPH, 20XPH, 40XPH, 100XPH
  • Numerical Aperture (NA) ranges from 0.1 to 1.25 depending on magnification
  • Working Distance (WD) from 0.21 mm (100XPH) to 16.15 mm (4XPH)
  • Field of View (FN) of 22 mm or 25 mm based on model type
  • Parfocal Length: 45 mm for all models
  • Designed for use with both infinite and finite optical systems
  • Compatible with standard 25 mm or 22 mm eyepieces depending on model

Who it is for

  • Clinical pathology labs sourcing objective lenses for routine diagnostics
  • Biomedical research institutions specifying phase contrast for cell dynamics
  • Microscope importers building a catalog of precision optical accessories
  • Laboratories upgrading to phase contrast capabilities with known optical system compatibility

Specifications

Model TypePlan Infinite / Plan Finite
Magnification4XPH, 10XPH, 20XPH, 40XPH, 100XPH
Numerical Aperture0.1 to 1.25
Working Distance0.21 mm to 16.15 mm
Field of View22 mm or 25 mm
Parfocal Length45 mm
Optical SystemInfinite or Finite

Use guide

  • Select infinite or finite model based on the microscope's optical system
  • Choose magnification and NA based on specimen type and required resolution
  • Ensure working distance is sufficient for specimen thickness and stage movement
  • Match field number (22 mm or 25 mm) to the eyepiece used in the microscope
  • Use 45 mm parfocal length to maintain focus when switching objectives

FAQ

What is the difference between infinite and finite models?
Infinite models are designed for microscopes with tube lenses; finite models are for traditional optical systems without tube lenses.
What is the working distance for the 100XPH objective?
0.21 mm for both infinite and finite 100XPH models.
Are these objectives compatible with standard eyepieces?
Yes, they are designed for 22 mm or 25 mm field number eyepieces depending on model.
Do all models have the same parfocal length?
Yes, all models have a 45 mm parfocal length for consistent focus across magnifications.
Can I mix infinite and finite objectives on the same microscope?
No, mixing requires a compatible optical system; ensure all objectives match the microscope's design.

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