The Bausch & Lomb StereoZoom® 7 Microscope (Cat. No. 31-27-01) is a high-quality instrument designed for a wide range of viewing and measuring applications. It offers variable magnification, allowing for detailed examination of specimens, and can be configured with various accessories to suit specific needs.
Function Description
The StereoZoom 7 Microscope provides continuously variable magnification through its Power Pod, which offers a 1X to 7X zoom range. This variable power, combined with different eyepieces and attachment lenses, allows for a broad spectrum of total magnifications, from 2.5X to 280X. The instrument is designed for stereoscopic viewing, providing a three-dimensional image of the specimen.
It can be used as a measuring instrument by inserting a reticle into one of the Wide Field Eyepieces. Various linear and grid patterned reticles are available for different measurement units. The microscope also supports various illuminators to optimize viewing for opaque, translucent, and transparent specimens.
Important Technical Specifications
- Magnification Range: The core Power Pod offers a 1X to 7X variable magnification.
- Eyepieces: Available in 10X, 15X, and 20X Wide Field Eyepieces. Eyeguards are available for 10X and 15X eyepieces.
- Attachment Lenses:
- 0.25X (reduces working distance to 10-1/2", increases working distance to 10-1/2")
- 0.3X (reduces working distance to 8-1/2", increases working distance to 8-1/2")
- 0.5X (reduces working distance to 4-5/8", increases working distance to 4-5/8")
- 1.5X (reduces working distance to 1-1/4", increases working distance to 1-1/4")
- 2.0X (reduces working distance to 9/16", increases working distance to 9/16")
- Total Magnification (with 10X Eyepiece):
- With 0.25X Attachment Lens: 2.5X - 17.5X
- With 0.3X Attachment Lens: 3X - 21X
- With 0.5X Attachment Lens: 5X - 35X
- Without Attachment Lens: 10X - 70X
- With 1.5X Attachment Lens: 15X - 105X
- With 2.0X Attachment Lens: 20X - 140X
- Total Magnification (with 15X Eyepiece):
- With 0.25X Attachment Lens: 3.8X - 26.3X
- With 0.3X Attachment Lens: 4.5X - 31.5X
- With 0.5X Attachment Lens: 7.5X - 52.5X
- Without Attachment Lens: 15X - 105X
- With 1.5X Attachment Lens: 22.5X - 157.5X
- With 2.0X Attachment Lens: 30X - 210X
- Total Magnification (with 20X Eyepiece):
- With 0.25X Attachment Lens: 5X - 35X
- With 0.3X Attachment Lens: 6X - 42X
- With 0.5X Attachment Lens: 10X - 70X
- Without Attachment Lens: 20X - 140X
- With 1.5X Attachment Lens: 30X - 210X
- With 2.0X Attachment Lens: 40X - 280X
- Working Distance: Varies significantly with attachment lenses. For example, with a 10X eyepiece and no attachment lens, the working distance is 10.5". With a 2.0X attachment lens, it reduces to 9/16".
- Stands: Eight basic stands are available: Series A, B, K, KT, S, SK, E, and ER. These stands offer different features such as trans-illumination bases, various arm configurations (stationary, rotatable), and stage plates (black/white, clear glass).
- Illuminators: Six types of illuminators are available: Reflector, Fluorescent, Nicholas, General Purpose, Coaxial, and Ring. These provide different lighting characteristics (directional, diffuse, cool light) for various specimen types and applications.
- Micrometer Discs: Available with various division values (e.g., 0.002", 0.005", 0.001", 0.01", 0.1mm) and patterns (cross line, grid, protractor, general purpose reticle).
- Stage Micrometers: Available in inches (0.01" and 0.001" divisions) and millimeters (0.1mm and 0.01mm divisions) for reticle calibration.
Usage Features
- Focusing: The focusing procedure involves setting the Magnification Knob to 1X (low power), centering the specimen, and adjusting the Focusing Knob. For critical focus, the Magnification Knob is set to 7X (high power), and the Focusing Knob is adjusted using only the right eye. The left eyepiece is then focused using its Adjusting Ring. This ensures proper focus across the entire magnification range.
- Changing Magnification: Magnification is changed by simply rotating the Magnification Knob between 1X and 7X. The total magnification is calculated as Variable Power x Eyepiece Power x Lens Attachment Power. The StereoZoom 7 features "image blackout" when changing magnification.
- Reticle Insertion and Calibration: Reticles are inserted into the right eyepiece by unscrewing the field diaphragm, placing the reticle on top with the scale facing downward, and securing it with the metal lip. Calibration requires a stage micrometer and involves aligning the reticle scale with the stage micrometer scale to determine the ratio of reticle intervals to stage micrometer intervals.
- Attachment Lens Installation: Attachment lenses are installed by removing the Power Pod from its stand, turning it upside down, positioning the lens with its longer pin perpendicular to the flat face of the Power Pod, and rotating it clockwise until it clicks into position. Care must be taken not to scratch the objective lens.
- Illuminator Selection and Mounting: The choice of illuminator depends on the specimen type, area to be illuminated, and desired intensity. Illuminators can be mounted in various positions on the stand or Power Pod to ensure centered illumination.
- Ergonomics: The microscope is designed for comfortable use, with long eye-relief eyepieces for users who wear glasses. Eyeguards are also available.
Maintenance Features
- Periodic Servicing: All optical, electrical, and mechanical components require periodic servicing to maintain proper performance and compensate for normal wear. A regular preventive maintenance schedule is recommended.
- Cleaning: A thorough cleaning, checking, and adjustment of mechanisms should be performed by qualified personnel.
- Lubrication: The Power Pod requires periodic lubrication. The focusing slide should be cleaned with xylene or alcohol and lubricated with a light coating of grease.
- Optics Cleaning: Eyepiece adapters and lens shields should be cleaned with a soft clean cloth. If a lens has grease or dirt, it can be cleaned with mild soap or detergent and water, followed by a thorough wiping with a dry cotton swab.
- Adjusting Focus Tension: The Series S and SK stands have two Allen-head screws that allow adjustment of the focusing mechanism tension. This helps maintain smooth and consistent focusing.
- Shipping for Service: If the instrument needs to be sent for service, it should be carefully packed in a crush-resistant carton with shock-absorbing material. A detailed letter describing the trouble experienced should be included.
- Warranty: The product comes with a warranty covering defects in materials or workmanship for one year from the date of purchase. The warranty does not cover damage due to carelessness, improper servicing, modifications, or unsatisfactory performance due to external components.
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