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RelayPlus 1x-43 | |||||||||||||||||||||||||||||||||||||||||||
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This lens was designed to be very versatile and high performance, in that it will work with linear CCDs and large area array CCDs over a broad wavelength range and a broad F/# range. The lens is telecentric in both image space and object space insuring that the image size remains constant during any change in focus. One use of this lens is in machine vision applications. For example, using a linear CCD with 10 micron pixels, and operating at 100 MHZ, the objects being scanned will move under the lens at over 160mm per second! It can also be used as a relay lens to allow insertion of an aperture or reticle at the intermediate image plane. Another use would be for fluorescence object detection. See the multiple configurations section below to see how that would be accomplished. |
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Large field:
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User changeable aperture: |
The initial lens was designed to work at F/8. However with a slightly reduced field size, it will work at F/6. The stop in the lens can be changed by the user to a different diameter. The lens would then work at F/50 or even smaller if desired for a really long depth of focus (with reduced light level, however).
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Broad band performance: |
The lens was designed to work over the wavelength range of 460 nm to 1100 nm. Current coatings restrict the lens performance to approximately 465nm to approximately 800nm. The performance at lower wavelengths (<460 nm) is outstanding, but will be more out of focus as you use lower wavelengths. If the lens is used only in a narrow wavelength range in the deep blue, then the performance in this reduced wavelength range will still be outstanding.
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Long working distance: |
The lens working distance (both image space and object space) is approximately 60.5 mm.
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Telecentricity: |
The lens is double telecentric. The lens is telecentric in both object space and image space.
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Multi-Configuration: |
See below for different possible configurations
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Versatile: |
This lens was designed to be incorporated into automation equipment, semiconductor equipment and other equipment of all kinds. There are mounting holes provided, and an optional mounting plate will allow the user to choose the angle the lens is to be used at.
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Views toward the input and output face are shown below.
An area 0.236 inches / 6.0 mm high from the optical axis to the longest length of the field is not usable due
to internal vignetting.
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Pt. 1. Imaged directly (1X magnification) on CCD:
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Pt. 2. Imaged directly
(1X magnification) on CCD:
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Pt. 3. Imaged directly
(1X magnification) on CCD:
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Pt. 4. Imaged directly (1X magnification) on CCD:
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Pt. 5. Imaged directly
(1X magnification) on CCD:
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Pt. 6. Imaged directly
(1X magnification) on CCD:
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The following cropped images are taken at the same six points using the same camera, but in conjunction with a 5X microscope objective. |
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Pt. 1. Imaged via 5X microscope objective on CCD:
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Pt. 2. Imaged via 5X microscope objective on CCD:
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Pt. 3. Imaged via 5X microscope objective on CCD:
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Pt.
4. Imaged via 5X microscope objective on CCD:
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Pt.
5. Imaged via 5X microscope objective on CCD:
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Pt.
6. Imaged via 5X microscope objective on CCD:
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NOTE: The lens relays the object to the image at 1:1 magnification in all configurations. The object and image
are interchangeable and would work equally well with the light going either way through the lens.
The cyan colored converging lines to the right and left or bottom of the lens represent the actual path
the light will take from the top and bottom of the object. For purposes of the following discussions,
the arrow points to the top (height) of the object. The width of the object and image is displaced into
and out of the screen.
The current configuration being manufactured (shown in the upper left diagram), relays the image reversed left to
right. A point on the middle of the object (bottom arrow) halfway between the two groups of light rays and
displaced out of the screen will be imaged in the same position on the image (other arrow), but displaced into
the screen.
Another approach is to have the object and image located on opposite sides of the lens (second diagram first row).
While the top of the object and top of the image are both oriented the same way with respect to the lens (arrow is
pointing the same direction), the image is still reversed into and out of the screen.
The third approach (bottom left diagram) is to use a beamsplitter in the input path to allow injecting the illumination
into the lens on the input side. The beamsplitter can transmit 50/50 for use with white light, or polarized if needed.
It also could be used to reflect UV (greater than 365nm) toward the image for viewing fluorescent objects.
The forth approach possible is to use a large cube beam-splitter to image the entire object (bottom right diagram).
In this case, the largest square field size (shown below diagram) is 32.5 x 32.5 mm. A larger size field of a 39.5 mm
square with the corners cut off (with a radius of 23.0 mm) can be used if the part of the image in the corners is not
needed. While the 46 mm diameter circle is the full field of the lens, internal vignetting on the sides limits the field.
Other approaches (not shown) are possible. For example, if one of the prisms of the opposite entry/exit approach is
changed to roof prism, then the image will not be reversed any longer, but will be the same orientation as if looking
directly through the lens. The field size will become diamond shaped due to the effects of the roof prism.
All specifications subject to change without notice.
Pricing: Call or email (info@gibsonoptics.com) for current price.
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Send mail to
gibson.optics@prodigy.net with
questions or comments about this web site.
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