Monocular, binocular, and trinocular describe the viewing-head layout of conventional optical microscopes. Takmly microscope uses a handheld digital camera design and displays the magnified view on a connected screen, so these terms are mainly useful when comparing it with traditional microscope systems.
[compare] Monocular | One eyepiece for single-eye viewing. Common for basic learning and straightforward observation. Binocular | Two eyepieces for more comfortable two-eye viewing during longer observation sessions. Trinocular | Two viewing eyepieces plus an additional camera port for image or video capture. [/compare] [note] Takmly microscope does not use the traditional eyepiece-head arrangement described above. Its close-up image is viewed digitally on a phone, tablet, or computer screen. [/note]Compound and Stereo Microscopes
Head type is only one part of microscope selection. The specimen and illumination method are also important.
[compare] Compound microscope | Commonly uses transmitted illumination from below the specimen. It is suited to thin or prepared samples that allow light to pass through. Stereo microscope | Commonly uses reflected illumination from above. It is suited to opaque objects and applications where a wider field of view is useful. [/compare]Prepared Samples
Slides can hold samples for viewing with a compound microscope using transmitted light.
Opaque Samples
A circuit board is an example of an opaque object commonly suited to stereo or reflected-light observation.
Choosing by Sample Type
- Coin: A coin does not transmit light, so reflected illumination is generally more suitable. A stereo microscope also provides a wider view for examining the object.
- Cell sample: A prepared biological sample is generally better suited to a compound microscope with transmitted illumination and sufficient magnification for fine detail.
Specialized Illumination and Methods
The compound-versus-stereo distinction is a useful starting point, but specialized systems can work differently. Some compound microscopes use reflected light for solid objects, while some stereo microscopes provide transmitted light for semi-transparent or translucent samples.
Darkfield
Darkfield is one specialized microscopy method used with suitable compound microscope configurations.
Fluorescence
Fluorescence microscopy is another specialized method used for suitable samples and applications.
Compound Microscope Components
Traditional compound microscopes commonly use an objective turret with multiple objective lenses. A condenser below the stage may focus illumination through the specimen.
- Some microscopes use a disc diaphragm to control the amount of transmitted light.
- Other designs use an adjustable iris and condenser positioning.
- Replaceable condensers can support specialized methods such as darkfield or phase contrast.
Phase Contrast
A phase-contrast condenser kit is an example of an accessory used for a specialized compound microscopy method.
Common Applications and Methods
Conventional microscope systems can be configured for many different observation tasks.
Example Applications
- Food, drink, and cosmetic samples
- Water and soil observation
- Live blood analysis
- Medical and clinical work
- Microbiology
- Pharmaceutical research
- Opaque samples and metallurgy
- Veterinary applications
Microscopy Methods
- Brightfield
- Darkfield
- Phase contrast
- EPI-fluorescence
- Metallurgical microscopy
- Polarizing microscopy
- Inverted microscopy
- Multi-view or training configurations
Typical Learning and Use Levels
- K-8 education
- Junior high and high school
- Undergraduate study
- Graduate study
- Research and professional use