Olympus SZ-III Stereoscopic Zoom Microscope instructions

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    The model SZ-Ill is .an advanced model of SZ which was a revolut-

    ionary product which adopted the zooming ma~nificotion mechanism, for

    the first time in the world in a stereoscopic microscope,. rapidly expanding

    its range of utilization such as in the classification of plants, anatomy

    of animals, or in assembly and inspection of modern electronic products

    and precision instruments.

    No outfocusing effect will be experienced and any desired magnifica-

    tion can be obtained within the area of the xoom ratio 5.7. Further,

    there is no "image fade away" when changing magnifications as in the

    case of any former microscope.

    Doubtlessly this will greatly increase the working efficiency. A set

    of Model SZ-Ill is completely equipped with accessories assuring its versatile

    utilization. This may be called the definitive product of stereoscopic



    1. Continuous flow of magnifications : Zoom ratio 5.7 2. Total Magnifications : (with objective 1 x ) With eyepieces GlO x : 7 x -4.0 x

    With eyepieces G20 x : 14 x -80 x 3. Inclined Binocular Head : Inclination-45'

    Angle of Visual Axes-12" 4. Range of Interpupillary Distance Adjustment :

    With eyepieces GlO x a t exit-pupil-46-74 mm. 5. Range of Ocular Tube Movement: By head rotation through 360' 6. Wide Field Eyepieces : GlO x

    7. Fixed Working Distance : 1 x Objective: 88mm

    0.5 x Objective : 159mm 0.75 x Objective : 105mm 1.5 x Objective : 45mm 2x Objective: 30mm

    8. Body Movement (Vertical) : 102mm By Rack & Pinion: 55mm By Pillar : 47mm

    9. Range of Body Rotation: 75O pivoted at the the pillar 10. Stage Plates: Glass plates (clear and smoked) Optional Accessories : Eyepieces : G20 x paired

    Objectives : 0.5 x , 0.75 x, 1.5 x and 2 x Epi-illumination equipment (model LSG-11) Trans-illumination equipment (model .LSD) Base (Reflector, Hand-rests, and illuminating lamp included.)

  • Magnification Ring

    Mag. Indicator Ring

    Threaded Hole C r Epi-Illuminator

    Body Supporting A > Block

    Focusing Knob I P Head Fixing Ring Pillar Clamp Screw --'.


    --'J \ Body Clamplng Screw I , - Stagm Clip

    Stage glass Plats

    r Strga dass Plat. Clrmplng Screw


    M i m p e : Body, Binocular Head, I x Objective Stand : Stage, Pillar Eyepieces: GlO x, Stage Clips : Large

    Stage Plates: Clear and Smoked Glass Eyepiece caps, Eye-shades, Cabinet, Plastic Cover, and Guarantee Card.

    1 set

    1 set

    1 pair

    1 * 1 each


    The objective, ocular and varif'cal lens systems are arranged aa shown above. The beams from speci- mtn prooaad into the Objective "Ob" with an angle of visual axes of g040', wherein they are turned parallel to each other. They further proceed through the morning vrriatibn system " ZL1 and ZL2" and the fixed lens- " L1 ", reaching the Prism P1 " where they again assume a 12' angle of visual axes and 45' inclination. Then the beams enter porro-prisms "P2" and finally reach the eyepieces or Oculars " Oc ". Continuous morning variation is performed by movement of the ZL lenses.


    The total Wfi- may be obtained by the following formula : T d Mag. =(Eyepie Mag.) x (Objactive Mag.) x (Magnification Indiitor Value)

    Using Objective 1 x : (Built-in)

    20X 2 40 X 5.0 2.5 50X 4.0 a 3 60x 3.3 8 3.5 70 x 2.9 a 4 8 0 ~ 2.5 a

    Using Objective 0.5 x :


    This system is composed of 2 sets of lenses placed and operated parallel, each set consisting of 2 groups of varifocal lenses. The change of magnifications is performed by zooming these group of lenstr and changing the focal length of the objective. In case of the magnification change from a low number to a higher one, the lower lens group (1st tens group) rises to the middle and then comes down. The upper lens group (2nd lens group) is lo\vered stright down. The magnification ratio for the zooming system is 5.7 With the use of an objective 1 x , i t varies from 0.75 x to 3 x . The following illustration indicates positions of lenses in different cases of magnifications.

  • Eyepiece Characteristics :



    G 10 x G 20 x

    Spacial Obejtive lenses have been designed for the exclusive use with SZ. The standard set includes a 1 x objective. This I x objective is built in the microscope body and cannot be removed. 0.75 x and 1.5 x objectives are also available as spbcsal acccwrim. Sina the 1 x objective is already fixed in the body other objectives, if used, must be attachad under the 1 x objective.

    Objective Characteristics :

    Focal Length

    25 mm 12.5 mm

    I Magnification I Focal Length I Working Distance

    Field of View (Diameter of the View Field of an Eyepiece)

    22 mm 122 mm

  • BODY :

    This is the maill part of the rnicrcwrcope inchding a built-in objactivc and the zooming variation mechanism, and is attached to the pillar by a coupling ring. When the magnification r i n ~ is turned, zooming movement of vary-focal lenses in the inside give a continuous flow of magnifications. Each scale on the magnification indicator ring shows that its rotation by one graduation means the change of total magnification by 0.1 X . The body can be rotated through 360 in the frame of the body coupling ring, thus enabling the user to freely choose whatever position he desires.

    HEAD :

    The head is designed with an inclinaton of 45' to the horizontal and a 12' angle of visual a x n to allow the user to rnaintgin a comfortable posture and avoid fatigues during a prolongad abservation. This also facilitates smooth coincidence of the two images (right and left) into one. The range of interpupillary distance adjustment, using eyepieces GlOx, .is 46-74 mm. Therefore, you can adjust it to your own by turning the ocular tubes. Eye-refraction difference will be adjust& by focusing correctly on the specimen through the right eyepiece and then turning the diopter ring to focus the left eyepiece.

    Inter-Pupillary Distance Adjustment


    Focusing is performed by: (1) Sliding the body on the pillar until rough focus is attained and (2) making fine adjustment by the focusing knob. The range of movement by the focusing knob is 55mm (up and down).

    STAND a

    The stand is composed of a stage and a pilIar. The stage is designed to asaure complete stability of the body mounted at the top of the pillar in whatever position it may be. The stage plate is mounted in the circular rtceptacle of the stagt which is poeitioned to fit the eyepiece viewfield. The stage plates arc interchangeable ac- cording to the method of okwations employed. Whichever plate (clear or m k t d ) may be user], it must be firmly fixed to the stage by the p~vid&i screw. The pillar holds the microscope body and moves 47mm vertically against the st* and r ~ t a t a through 75' to right and left. The inner tube of the pillar, assisted by the built-in balancing spring, firmly holds the body and the coupling plate, slides up and down in the outer tube, and can be stabilized at a desired position by the pillar clamping screw.


    Pstts of the micmcmpe taka out of the cabinet will be assembled in the following d r :

    Order of Assembly : 1. Set the focusing part onto the body supporting block and secure it tightly by the

    providad scrcw. 2. The coupling ring with the micmampc will be only slightly tightened and the

    body must be firmly affixed by the providad s c m . 3. Place a stage plate into the receptacle and fasten it by the clamping screw. 4. Sct the stage clip. 5. R c m m the eyepiece caps from the binocular tube and place eyepieces into a p

    @tc position. There are two methods of obaewations-by rdccted light and by trans-illumination. In case of the latter, the s+l accssory (the base and the illuminating equipment) wilI be u d .

    Order of Okrvation : According to the type of the observation, the pPoptr stage plate must be ud-the

    clear gl= for tnnc~lluminated observation and the smoked glass for reflected light. ' HOW- ever, even in the ear# of the reflected light, if the specimen is in white or in bright colon, YOU may darken the view field by placing a piace of black board or p p r underneath the clear stage plate, so as to give a contrast.


    The Olympus Model SZ-I11 is designed to de ~ar foeaI in both right and left eyepieces on all magnification settings at the standard distance of distinct vision (250 mm). However, each person has a different distance of distinct vision from the other. TO obtain satisfactory parfocality with the Model SZ-111, follow the below described procedures when focusing the image of specimen.

    (1) Set the both (right and left) diopter rings at '0'. (2) Set the magnification drum at '4'. (3) Focus the image by means of the focusing knob. (4) Set the magnification drum at '0.7'. (5) If the image is out of focus, perform focusing by adjusting the diopter ring(s)

    ...... right or left, or both, as required. DO NOT perform focus adjustment with the focusing knob.

    (6) Once again set the magnification drum at '4'. If the imagc is still out of focus, adjust the diopter ring(s) (right or left, or both) to bring the image in focus. DO NOT perform focus adjustment with the focusing knob.

    (7) Now your Model SZ-I11 has been adjusted to be parfacal at your own distance of distinct vision. Hence, re-adjustment of microscope when you switch from one magnification to the other is not necessary.

  • 1. Conversion objectives 0 . 5 ~ 0.75 x 1 . 5 ~ and 2.0~

    2 Eyepiece G20x paired

    3. Epi-illuminator LSG-II with TF transformer

    4. Illuminator LSD with TC transformer

    5. Trans-illuminating stand

    6. Fluorescent illuminat.ing stand LSF

    7. Universal stand VS-IV

    8. Subsidiary pillar for conversion objective 0 , 5 x ,

    I 9. Iris diaphragm. i


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