Diopter Telescope
The Diopter Telescope is primarily used to check the range and establish the “zero” setting of focusing eyepieces for optical products such as binoculars, rangefinder microscopes, theodolites, spectrometers, telescopes, etc. It may be used for measuring the power of a lens (within range), measuring field curvature of a lens, determining the range of focusing eyepiece, and measuring astigmatism of a telescope.
Its scale is calibrated in major numbered divisions of whole diopters, with the smallest divisions equal to 0.1/0.25 diopters. Estimates to 0.05 diopter are easily and accurately made. Eyepiece has a long eye relief with 13X magnification. Eyepiece Graduation: +/- 5 Diopter Eyepiece Reticule: Cross Line of 10-15 microns width All Optical Lenses are AR coated for visible wavelength.
| Model No | Focal Length | Field of View | Range of Measurement | Resolution | Length |
|---|---|---|---|---|---|
| DPT-01 | 40 mm | 13° | +/- 5D | 0.2 Diopter | 100 mm |
| DPT-01A | 40 mm | 13° | +/- 5D | 0.1 Diopter | 100 mm |
| DPT-01B | 40 mm | 13° | +/- 6D | 0.2 Diopter | 100 mm |
| DPT-02 | 90 mm | 6° | +/- 1D | 0.25 Diopter | 140 mm |
Highly precise Instrument to align machine bores, bearings and optical Instrument line of sight axis. Linear shift up to 30 m measured in both axes with precision Micrometer with 20 microns Resolution. Plano Optics offers a wide range of targets suit specific applications.
Applications
- Testing diopter graduation, focusing range and infinity (“zero”) setting of eyepieces.
- Measurement of power of lenses
- Testing the astigmatism of telescopes
- Measuring the field curvature of lenses