Coupler or camera adapter, is also called photo eyepiece, CCTV adapter, CCD adapter, camera adapter, digital camera adapter etc.
Coupler is an optical imaging lens that uses mechanical adapter device to connect the camera to the microscope, and project the image onto the camera's target through the adapter.
Coupler/C-mount adapters have different magnifications to capture images of different magnifications and field of view. In optical imaging, optical parameters such as chromatic aberration, distortion, and field curvature are also to be considered to ensure image quality. At the same time, for some other couple/C-mount adapters, factors such as the position and angle of the camera are also considered to suit the needs of the observational environment.
Coupler/C mount adapter is an adapter commonly used for connection between the C adapter camera (industrial camera) and a microscope.
Different coupler/c mount adapter are suitable for different microscopes. For some, some adapter accessories need to be replaced. See the applicable range of each coupler/c mount adapter for details.
Coupler magnification refers to the line field magnification of the coupler/c mount adapter. With different magnifications of the adapter lens, images of different magnifications and fields of view can be obtained. The size of the image field of view is related to the sensor size and the coupler adapter magnification.
Camera image field of view (mm) = sensor diagonal/coupler adapter magnification.
For example: 1/2 inch sensor size, 0.5X c mount adapter, field of view FOV(mm) = 8mm/0.5=16mm
The field of view number of the microscope 10X eyepiece is usually designed to be 18,20,23mm, less than 1 inch (25.4mm). Since most commonly used camera sensor sizes are 1/3 and 1/2 inches, this makes the image field of view on the display always smaller than the field of view of the eyepiece for observation, and the visual perception becomes inconsistent when simultaneously viewed on both the eyepiece and the display. If it is changed to a 0.5X adapter, the microscope image magnification is reduced by 1/2 and the field of view is doubled, then the image captured by the camera will be close to the range observed in the eyepiece.
Some adapters are designed without a lens, and their optical magnification is considered 1X.
