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Gemological Equipment, Faceting Machines, Lapidary Equipment

Gemological Equipment

This equipment is not available at this time.

Here are photos of the Digital Scanning Spectroscope. "The Challenger" - A manual operated scanning diffraction grating digital Spectroscope.
The finest hand-made equipment available at a reasonable price. Check with your closest Gemstoneworld Dealer for availability.

Special Pricing: US$1940.00

Compare to G.I.A. US$4300.00 for non-digital, non-scanning diffraction grating spectroscope.

The Challenger is a highly sophisticated digital scanning spectroscope using the latest advnace technology for gem identification.

The optical, mechanical and electronics system design in the Challenger has been optimized for maximum efficiency and resolution.

Viewing of the spectrum is enhanced through a telescope in the system for fixed spectrum position and focusable magnification.

The spectrum can be scanned manually by turning a scanning knob located in the upper rear of the spectroscope body. Any absorption or fluorescence band from 400 to 700 nanometers can be scanned and placed in line with a white line reticle in the center of the eyepiece field. A digital display in the upper spectroscope body will display the nanometer wavelength of the band placed in line with the white line reticle.

The Challenger has also been designed to provide maximum user friendliness.

Digital Scanning Diffraction Grating Spectroscope


Operating Instructions:

1. With the Challenger mounted on its light source base mounting bracket, release and slide the Challenger placing the front of the slit side approximately 20 to 25 millimeters away from the light aperture stop iris diaphragm. This can be accomplished by turning the large scalloped red knob counter clockwise and sliding the spectroscope to position. The knob is automatic and when released the knob will automatically lock in place.

2. Adjust the opening of the iris diaphragm aperture (light source) for the gem size to be examined and place gem on the opening of the light source.

3. Adjust your eye position at the eyepiece for proper viewing. The eyepiece used in The Challenger has a built-in eye relief so the eye can (and should) be kept a short distance away from the eyepiece. Due to the telescope used in the instruments design, the eye must be positioned close to the center of the eyepiece. At the same time, however, the length of the spectrum within the viewing field may require the operator to tilt his/her eye slightly in order to see the extreme ends of the spectrum.

4. With the eye positioned on the eyepiece, open the aperture slit by turning the slit red knob counter clockwise and view the spectrum. While viewing the spectrum, rotate the vertical tilt knob located on The Challenger mounting bracket clock or counter clockwise until the viewed spectrum appear the brightest.

5. With the eye positioned on the eyepiece, turn the telescope draw tube focusing knurl red knob clock or counter clockwise until the spectrum appears well focused.

6. If spectrum appears too bright and the absorption or fluorescence bands washed out or weak, turn the slit red knob clockwise to reduce the spectrum brightness and intensify the bands. Also, tilt The Challenger from vertical position to an angular position, or vice-versa, to maximize the intensity of the bands.

Emerald, peridot, tourmaline and zircon bands appear the sharpest when The Challenger is in direct or close to vertical position. Ruby absorption and Fluorescence bands appear the sharpest with Challenger tilted about 30 degrees from vertical, and red spinel about 50 degrees from vertical.

7. Open the reticle line ambient light window to light the reticle line.

8. The reticle line is focused independently from the spectrum by turning the eyepiece either clockwise or counter clockwise.

9. After the reticle line is focused if the spectrum appears out of focus, repeat procedure No. 5 to focus the spectrum. Due to the difference in wave lengths from 400 - 700 nanometers if the spectrum is focused in the red, the blue will appear slightly out of focus and vice-versa. The reticle line is independent from the spectrum and once set in focus will remain in focus.

10. The Challenger is equipped with a manual scanning dial engraved with 5 nanometer divisions and is located in the upper rear of the spectroscope main housing.

The digital display is located on the top of the main housing for easy viewing, and reads in one nanometer numerals from 390 to 720 nanometers.

The Digital display can be turned on/off using the red push button switch located on the rear side of the spectroscope main housing.

11. To examine gem spectrum, follow operating instructions 1 thru 9.

12. Turn on Digital Display.

13. With the eye on the eyepiece, view the gem spectrum and turn scanning dial clock or counter clockwise to scan spectrum and place an absorption or fluorescence band in line with the reticle line.

14. Look at the digital display to read the nanometer wavelength of scanned band.

15. The light source has a light dimmer control knob for brightness setting.

With experimentation and practice, you will soon learn the optimum use of The Challenger and positions for the various gems.

This equipment is not available at this time.
Please email Gemstoneworld for prices and details.

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