Optika OPTIGEM-10 Data sheet [EN]

GEM Series

OPTIKA

MICROSCOPES

®

ITALY

3

Inspection & Industrial

Stereozoom Microscopes For Gemology

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GEM Series

Inspection & Industrial

As a leading company in the supply of gemological microscopes, OPTIKA offers a series of
microscopes purposely designed for this sector by using both brightfield and darkfield methods
OPTIGEM-10 and OPTIGEM-20. This series has been designed and manufactured in order to satisfy
the requests of a very demanding industry; brightfield/darkfield, immersion analysis, light color tem­perature: no detail has been left to chance.

Specifically Designed for Specialists

Gemological stereomicroscopes are meant to help with stone inspection. Jewels and gems have a
variety of grades (or quality levels), which ultimately influence their value and cost on the market;
therefore it is important to have solutions that are purposely designed for gemology.
These stereomicroscopes are equipped with iris and darkfield condenser on the bottom light
source, and with a set of on stage tweezers to hold the stone in place.

Much More Than Gemological Stereomicroscopes

OPTIGEM-10 & OPTIGEM-20 are two-in-one gemology instruments that can be used both in

vertical and horizontal position in a very easy way, just by turning one knob (no disassembling
and re-assembling operations are required). The horizontal position extends the use of a
gemological microscope, giving the possibility to perform immersion analysis by submerging a
sample in liquid. If the stone’s refractive index is close to the liquid’s one, immersion makes the
interior more visible by reducing the effects of refraction and surface reflection. This enables you
to see a gem’s inclusions or color distribution more easily.
Immersion is also necessary to see crystal growth structures, which might help you separate
natural from synthetic corundum. Features like curved growth striae in flame-fusion synthetics, or
separation planes in assembled stones, are often far easier to see when the stone is immersed.

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Vertical position for standard gem

analysis with darkfield illumination

and polarizing tecnique

Incredibly Versatile Operations

OPTIGEM Series offers multiple options for illumination and contrast techniques, such as

incident, transmitted and oblique brightfield darkfield, polarization and immersion analysis
only on Optigem 10 & 20. They come with a special optical condenser configuration to
ensure real, perfect darkfield application (see the dedicated chapter for further information).

Horizontal position for

immersion gem analysis

Stereozoom Microscopes For Gemology

Ultrabright LED Condenser for Optimized Illumination

An ultrabright LED-based electronic condenser with intensity control allows to switch from
brightfield to darkfield; it also produces perfectly the colour of daylight.
The condenser uses a new optical configuration especially created in order to obtain a perfect
darkfield application.

With darkfield observation, the unscattered beams from the image are excluded: as a result, the
field around the specimen is generally dark.
An additional flexible arm and velvet-field slider produce extra contrast for crisp and vibrant
images. The illumination of OPTIGEM microscopes is greatly performing and this brings this
series to be ideal for precious stones and jewels evaluation.

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Inspection & Industrial

Get the most out of our accessories

A wide range of optional accessories completes these instruments: from gemology
clip, iris aperture diaphragm, polarization analysis kit, optical unit to switch
the darkfield from a “sharp” (gem exhibition) to a “soft” (diamond
analysis) mode, translating cell holder with vacuum pick-up
and quartz immesion cells complete and enhance the
OPTIGEM-10 & OPTIGEM-20 performances. All the
accessories can be stacked, in any order, while using
the microscope both horizontally and vertically.

ST-202

ST-202 - Polarizing analysis kit

Polarization technique allows to quickly determine if the stone at hand
is isotropic or anisotropic or, at best, to determine the optic character of
gemstones (twin planes, strain, pleochroism, etc.). It is also the preferred
tool for separating synthetic Quartz from its natural counterparts. In
addition, the polarizing microscope may be very useful for distinguishing
solid inclusions from negative inclusions as well as for spotting
polysynthetic twinning.

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Inspection & Industrial

Applications

Some application examples demonstrating the performance
of OPTIGEM Series, especially designed to observe samples
of precious stones and jewels and provided with specific
features for gemological needs.

Legend

1. Inspection of stones with OPTIGEM-10.

2. Inspection of stones with pure white darkfield illumination.

3. Immersion cell (ST-203) on a translating support (ST-204).

4. Sample of Citrine.

5. ST-201 accessory creates a soft darkfield illumination
ideal for diamond analysis.

6. Optigem can be easily rotated to a horizontal working
position.

7. ST-201 accessory for analysis under polarized light.

8. Working with Optigem and its accessories (they can be
stacked for increased functionality).

GEM Series

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3

2

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Inspection & Industrial

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5

7

8

6

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GEM Series - OPTIGEM10 model

Binocular gemological stereomicroscopes for brightfield and darkfield applications with special side-emitting LED illumination ring for true darkfield
illumination. Equipped also with 4 incident LED flexible arm and a diffusive LED disc for transmitted illumination.
The instru ment can be easily tilted horizontally for immersion analysis.

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Inspection & Industrial

0.7x÷4.5x

X-LED

3W LED

4W LED

DFDF

AB030

Part Description

Observation mode: Brightfield, darkfield.
Heads Binocular, 45° inclined, 360° rotating.
Interpupillary distance:
Dioptric adjustment: On both eyepiece tubes.
Eyepieces: WF10x/21 mm, high eye-point.
Objective:
Working distance:
Specimen stage:
Focusing:
Stand:

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Adjustable between 51 and 75 mm

Parfocal achromatic zoom 0.7x...4.5x (zoom factor 6.43:1).
100 mm
Gemological stage, with clamp for holding gems.
Rack and pinion mechanism controlled by a pair of knobs.
Fixed arm stand with tilting system (with position lock control).

It can be totally overturned and rotated allowing in this way
to obtain a 2-in-one instrument: an instrument for standard
observations and one for obser vation of water-immersed gems.

Part Description

Darkfield
illumination:

Transmitted light
llumination:

Incident
illumination:

Color temperature:

Equipped with a state-of-the-art illuminator for
darkfield observation. It consist of an innovative side­emmiting LEDs ring with an emission angle of 38°. With
brightness control.

Equipped with a LED illuminator, located under the stage.
With brightness control.

Equipped with a flexible gooseneck-arm 4-LED
illuminator. With brightness control.

Pure white 6,300 K

GEM Series - OPTIGEM20 model

3

Trinocular gemological stereomicroscopes for brightfield and darkfield applications with special side-emitting LED illumination ring for true darkfield
illumination. Equipped also with 4 incident LED flexible arm and a diffusive LED disc for transmitted illumination.
The instru ment can be easily tilted horizontally for immersion analysis.

21

0.7x÷4.5x

X-LED

3W LED

4W LED

Inspection & Industrial

DFDF

AB030

Part Description

Observation mode: Brightfield, darkfield.
Heads Trnocular, 45° inclined, 360° rotating.
Interpupillary distance:
Dioptric adjustment: On both eyepiece tubes.
Eyepieces: WF10x/21 mm, high eye-point.
Objective:
Working distance:
Specimen stage:
Focusing:
Stand:

Adjustable between 51 and 75 mm

Parfocal achromatic zoom 0.7x...4.5x (zoom factor 6.43:1).
100 mm
Gemological stage, with clamp for holding gems.
Rack and pinion mechanism controlled by a pair of knobs.
Fixed arm stand with tilting system (with position lock control).

It can be totally overturned and rotated allowing in this way
to obtain a 2-in-one instrument: an instrument for standard
observations and one for obser vation of water-immersed gems.

Part Description

Darkfield
illumination:

Transmitted light
llumination:

Incident
illumination:

Color temperature:

Equipped with a state-of-the-art illuminator for
darkfield observation. It consist of an innovative side­emmiting LEDs ring with an emission angle of 38°. With
brightness control.

Equipped with a LED illuminator, located under the stage.
With brightness control.

Equipped with a flexible gooseneck-arm 4-LED
illuminator. With brightness control.

Pure white 6,300 K

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GEM Series - Comparison chart

Model Head Eyepieces Objective Stand Illumination

OPTIGEM-10 Binocular,

360° rotating,
45° inclined

OPTIGEM-20 Trinocular,

360° rotating,

Inspection & Industrial

45° inclined

Wide Field
10x/21mm

Wide Field
10x/21mm

0.7 .... 4.5x

Zoom

0.7 .... 4.5x

Zoom

Gemological
stand

Gemological
stand

Incident illumination: 4 LED exible arm with brightness adjustment.
Transmitted illumination: Diusive LED disc for obser vation in brighteld and

side-emitting LED ring for observation in darkeld.

Incident illumination: 4 LED exible arm with brightness adjustment.
Transmitted illumination:Diusive LED disc for obser vation in brighteld and

side-emitting LED ring for observation in darkeld.

GEM Series - Optical Performance

OPTIGEM-10 / OPTIGEM-20 - Optical performance

Eyepiece 10x (ST-081) 15x (ST-082) 20x (ST-083)

Field number (mm)

Objective Total magnication Field of View (mm) Total magnication Field of View (mm) Total magnication Field of View (mm)

0.5x (W.D. 165 mm)

0.75x (W.D. 117 mm) 5.25x-33.75x 40.00-6.22 7.875x-50.625x 28.57-4.44 10.50x-67.5x 19.05-2.96

1x (W.D. 100 mm) 7x-45x 30.00-4.66 10.5x-67.5x 21.43-3.33 14x-90x 14.29-2.22

1.5x (W.D. 47 mm) 10.50x-67.5x 20.00-3.11 15.75x-101.25x 14.29-2.22 21x-135x 9.52-1.48

2x (W.D. 33 mm) 14x-90x 15.00-2.33 21x-135x 10.71-1.67 28x-180x 7.14-1.11

3.5x-22.5x

21 15 10

60.00-9.23 5.25x-33.75x 42.86-6.67 7x-45x 28.57-4.44

GEM Series - Contrast method comparison

Citrine - OPTIGEM-20 - 0.7x zoom - Brightfield

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Citrine - OPTIGEM-20 - 0.7x zoom - Darkfield

GEM Series - Accessories

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Eyecups & Eyepieces

ST-081 EW10x/21 eyepieces (pair), high eyepoint, with rubber cup
ST-082 WF15x/15 eyepieces (pair), high eyepoint
ST-083 WF20x/10 eyepieces (pair), high eyepoint
ST-084 WF10x/21 micrometric eyepiece, high eyepoint, with rubber cup

Additional Lenses

ST-086 Additional lens 1.5x (w.d. 45mm)
ST-087 Additional lens 2x (w.d. 33mm)

Condenser & Filters

ST-202 Polarizing analisys kit

Camera Adapters

M-113.1 Ring adapter, 30mm (for monocular and binocular microscopes)
M-115 0.35x C-Mount projection lens
M-114 0.5x C-Mount projection lens
M-118 0.75x C-Mount projection lens
M-173 C-Mount projection lens for APS-C/full frame reflex cameras (trino)
M-699 Universal adapter for C-Mount projection lens (trino)
M-620 0.35x focusable C-Mount adapter
M-620.1 0.5x focusable C-Mount adapter
M-620.2 0.65x focusable C-Mount adapter
M-620.3 1x focusable C-Mount adapter

Miscellaneous

15104 Cleaning kit
DC-002 Plastic dust cover, medium, 490(l)x490(h) mm
M-005 Micrometric slide, 26x76mm, with 2 scales (1mm/100 & 10mm/100)
ST-092 Protective glass for stereohead
ST-201 Iris aperture diaphragm for darkfield
ST-203 Glass immersion cell
ST-204 Translating cell holder
ST-205 Vacuum pick-up (with electric vacuum pump)
ST-207 Iris aperture diaphragm for brightfield
AB-030 Antibacterial surface treatment, only for newly purchased microscope

Inspection & Industrial

15104 - Cleaning kit

It cleans glass quickly and effectively,
without leaving residue or odor.
Ideal for precision lens or prism cleaning.

How to connect the cameras to our microscopes.
Please refer to the Adapter reference list on Digital section.

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Inspection & Industrial

v 6.8.0 - OPTIKA reserves the right to make corrections, modications, enhancements, improvements and other changes to its products at any time without notice.

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