OPTO-EDU A18.1828 User manual

A18.18 28

Comparison Microscope

Instruction Manual

To ensure the safety and obtain satisfactory performance, please study this instruction manual thoroughly be

fore start to use the instrument.

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I.Features and Uses

Though optical enlargement, this comparison microscope ,can help the user to

observe clearly, by looking into the same eyepiece set, the images in both the right

and the left imaging view fields, and compare two or more objects effectively in

cutting, joining or overlapping view fields. Due to its powerful magnification, this

instrument enables the user to perceive the differences between very small similar

objects.

Model A18.1828 Comparison Microscope is a new generation product of our

long-time experience and technical innovation. With our success in solving the

technical problem of the adjustability of its separation line width, its quality has,

therefore, reached the international advanced standard.

This model is an ideal instrument for police stations, procuratorial organs and

courthouses to identify finger prints, shot marks, tool traces, seals and writings, and

for colleges and universities to use for educational purposes as well. It is also suitable

for banks, archeological studies, electronics researches, biological science and

agriculture, etc.

II.Technical Parameters

10X 20X

Photo

-taking

Video

-recording

Working

Distance

Objective

1X 10X/φ21 20X/φ12 1.8X

Actual

Measured

Value

102mm

1.5X 15X/φ15 30X/φ8 2.7X

2X 20X/φ11 40X/φ6 4X

4X 40X/φ6 80X/φ3 7X

6X 60X/φ3.9 120X/φ2 11X

0.5X 5X/φ60 10X/φ24 0.9X 143

Eyepiece

Mag./Viewfield

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Fig.1

1. Total switch

2. Light adjusting knob

3. Coarse adjusting focus knob

4. Horizontal linkage knob

5. Working table lifting knob

6. LED light source

7. Objective

8. Six-holes nosepiece

9. Separation line window

10. Separation line adjusting knob

11. Video recording tube

12. CCD (option)

13. Camera adapter

14. Photography tube

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15.Eyepiece

16. Binocular head

17. Bridge body

18. Air-blast light source

19. Rotating ,tilting table plate

20. Horizontal working table

21. X-axial movement knob

22. Y-axial movement knob

23. Control panel

24. Polarizer

25.Anlayser

26. Coaxial light

27. 0.4X objective

28. Green filters

29. Red filters

30. Magnification reticle

III. Assembly and Preliminary Observation

1. Loose the clamping screw, take off the dust cover, fix up the binocular

head(16),and then clamp it with this screw;

2. Remove two dust covers from the binocular tubes, insert the required eyepieces

into the tubes;

3. Plug one end of the power line into the socket on the base, the other to the socket

with 110V-220V ground protection;

4. After the above steps are completed, you can carry on preliminary observation.

Place two pieces of paper on the table plates(19), press the total switch to turn on

this instrument, and drive the knob (3 ), observe this paper’s images through two

eyepieces, and then drive left or right lifting knob(5) until observe the sharpest

images.

In order to acquire more better effect, you must know further this instrument’s

functions.

Ⅳ.Functions and Operations

1.Turn on total switch (1), according to your demand , press the light source

changeover switch on control panel (23) to select air-blast light source(18) or LED

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cold light source(7).

2.View-speed adjustment : Fix up eyepiece, drive binocular head(16) to adjust

interpupillary distance, shown as Fig.2

Fig.2

3.Horizontal working table: Place some specimen on two table plates, separately

drive left and right lifting knob(5) to keep the image clear. For moving left and right

the stage, rotate the knob(21); for moving forward and backward the stage , rotate the

knob(22).

4.Adjustment of separation line: The separation line should be a fine and black

straight one. Turn the separation line adjusting knob(10) to move the separation line,

you may get the left and right single viewfield observation, cutting-image and

superimposed-image comparison. When black and white line are wider , rotate the

black screw at the right of the knob(10), when width are not identical , rotate the

black one at the left of the knob(10).

Fine and black Wider black line Width are not identical

Straight line and white line

Fig.3

5.Magnification Adjustment: For in use, both left and right objective should be at the

same magnification . To rotate the six-holes nosepiece (8) to select the required

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magnification. In order to observe a large viewfield, set 0.4X low-magnification

objective to the whorl (at the downside of objective) and then renew focusing .

Fig.4

To order to keep both left and right objective at the same magnification, the

operator must make focusing by the following methods : separately place the

magnification reticles(30) on two table plates, and view them through eyepieces until

two reticles’ scale can completely coincide . If the left and right scales are not

matched , turn the magnification correcting knob until the reticles’ images are

sharp , and then move the reticles to keep two reticles’ scales completely coincide.

Repeat several operations , you may make sure that both left and right objective are at

the same magnification . When change the objective’s magnification, make some

adjustment according to the above methods.

6.Bullet holder : shown as Fig.5

To observe breech-face markings To observe bullet profile

To observe the bottom of cartridge To observe cutting trace

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To observe large cartridge case To observe irregular object

Fig. 5

7.Video recording: For video recording , fit up video recording tube(11), on which the

CCD (12) is fixed, and then use special video wire, connect to monitor(or computer),

push in the lever, the operator may observe an image on screen.

8. Photographing: After finishing visual observation, draw out the lever for

photographing. Fit the back of camera into the adapter(13), and then insert to the

instrument. Observe the object through viewframe , adjust both left and right stages

to obtain a satisfying image, and then take a photo.

9.Polarization Light : Insert polarizer to the chamber of strong light mount , set

analyzer to objective tube, shown as Fig.6

Fig.6

10.Coaxial Light : Set coaxial light device to objective tube , adjust strong light

mount to the horizontal location , and vertically illuminate the deep hole, if observe

the inside of hole , incline the table plate.

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Fig.7

11.Power source: All electric parts are built into the base of instrument. If there is

some wrong with the instrument , firstly check the fuse at the back of base. Any

further examination or repair which might become necessary should be entrusted to

our factory or other special department.

Ⅴ. Maintenances

 The instrument must be kept in shade ,cool and dry place ,free of dust ,acid ,alkali

and vapor. As soon as work is finished , the dustcover should be put on it.

 The instrument must be kept clean. The dust of optical surface can be blown by a

balloon or should be cleaned off with a soft hair brush, the dirty can be wiped off

gently with lens tissue moistened with xylene.

 The instrument should not be disassembled by the user .Any examination or

repair which might become necessary should be entrusted to our factory or other

special department.

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A18.1828 Packing List

Mainbody 1 pcs Video Adapter 0.5x 1 pcs

Binocular head 1 pcs Photography tube 1 pcs

10X Eyepiece 2 pcs Photo adapter 1 pcs

20X Eyepiece 2 pcs

12V50W halogen lamp

2 pcs

Objective 0.5x, 1x, 1.5x, 2x, 4x, 6x 2 pcs/each

5W LED Light 2 pcs

Auxiliary Lens 0.4X,2.0x 2 pcs/each

3.0 M CCD Built-in Main

Body 1 pcs

Polarizer & Analyzer 2 pcs/each

Power cable 1 pcs

Coaxial light device 2 pcs Fuse 1 pcs

Operating Introduction 1 pcs Fittings case 1 pcs

Red , Blue, Yellow, Green ,

Ultraviolet Filter Lens 2 pcs/each

Dustproof cover 1 pcs

Bullet holder 2 sets Certificate of quality 1 pcs

Magnification Correcting Lens 2 pcs

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