Optical apparatus for fluorescence observation
An optical device and fluorescence technology, applied in optics, optical components, measuring devices, etc., can solve the problems of material considerations without optical performance, optical deformation, difficult bonding, etc., and achieve the effect of good transparency and high contrast
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Embodiment 1
[0042] figure 2 It is a sectional view showing the tip of an insertion portion of an endoscope according to an embodiment of the present invention. exist figure 2 The distal end of the insertion portion of the shown endoscope has an observation objective optical system 1 including a plurality of lenses built into the distal end body, including the adhesive (silicone adhesive) 4 of the first embodiment described above. A cemented lens made by cementing lens 2 and lens 3 together.
[0043] That is, apply a small amount of silicone adhesive 4 on the bonding surface of lens 3, and after bonding lens 2 and lens 3, spread silicone adhesive 4 to the entire bonding surface, leave it at room temperature or heat to cure, Thus, a cemented lens is produced.
[0044] In this embodiment, the base resin of the silicone adhesive 4 is in contact with the platinum group metal catalyst, so that the silicone adhesive is cured, and the lens 2 and the lens 3 are fixed. In this case, the occur...
Embodiment 2
[0048] image 3 Representative cemented lenses of microscope objectives for fluorescence observation are shown. The first lens 11 and the second lens 12 are bonded with the silicone oil 13 of the above-mentioned second embodiment, and a sealant 14 is formed on the outer periphery of the adjacent edge portion of the first lens 11 and the second lens 12. The gaps of the mirror frame 15 are filled with the silicone adhesive 4 according to Embodiment 1 for bonding and fixing.
[0049] In the silicone adhesive 4 and the silicone oil 13 used in this example, the impurity content of platinum group metal catalysts, multiple bonding groups, transition metals, and rare earth elements is reduced, so that the generation of autofluorescence can be suppressed to a minimum. lower.
[0050] In particular, by making the silicone oil 13 completely free of platinum group metal catalysts, and making multiple bonding groups (phenyl, carboxyl, sulfinyl, ether, acryloyl, acetyl, etc.) and transiti...
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