JPS5997108A - Receptacle for optical communication - Google Patents

Abstract

PURPOSE:To enable safe and easy attaching of a circular cylindrical lens in a receptacle body while adjusting the position of the lens by forming guide holes for insertion of guide bars on the outside lateral face of a disc fixed to the outside peripheral part of the circular cylindrical lens. CONSTITUTION:Guide holes 2b, 2b are provided on both sides of a loose fitting hole 2a for a lens. A guide means 4 consists of a base body 4a, and two flexible guide bars 4b, 4b which are spaced at the same space between the holes 2b and 2b, are fixed at one end and have the top ends bent to an L shape. A disc 2 is fixed to a circular cylindrical lens 1 and the lens unit is engaged with the means 4, then the disc can be moved while the contact with the receptacle body is maintained without allowing the guide means to contact with the lens and without concealing the disc. There is therefore no possibility of damaging the lens in the operation for fixing the lens to the receptable body and the bonding job is easy.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention applies to optical fibers that are essential for optical communication components connected to optical fibers, such as optical splitters/combiners, optical demultiplexers/combiners, and optical switches. The present invention relates to a communication receptacle, and more particularly to an optical communication receptacle that can be easily attached to a receptacle body using a cylindrical lens glue for converting emitted light from an optical fiber into parallel light.

[Conventional configuration and its problems]

Figure 1 shows the cross-section of the optical path in which the emitted light from the end of the fiber passes through the cylindrical lens and becomes parallel light.4The cylindrical lens a is located on the optical axis at a distance from the optical fiber b by the focal length of the lens. will be placed in

When a conventional optical communication receptacle is used to attach a cylindrical lens as described above to a main body, for example, as shown in FIG. In order to fix the lens unit firmly and to align the optical axes of the lens and the optical fiber, a guide plate 3 having elasticity and having a hole 3a slightly larger than the lens diameter as shown in Fig. 3 is used. 3 holes 3a Helens 1
The optical axes are aligned by inserting the guide plate 3 and moving the guide plate 3.

However, in this case, in order to guide the lens 1 through the guide plate 3, the lens 1 must protrude from the disc 2 by at least the thickness of the guide plate 3, and the lens 1 must be inserted into the hole 3a of the guide plate 3. When inserting the lens, the plate surface may come into contact with the lens end surface and damage the lens end surface. When the lens 1 enters the hole 3a of the guide plate 30, the edge of the lens 1 may be chipped. When fixing the receptacle body to the receptacle body with adhesive, the guide plate 3 covers a large part of the disc 2, as shown in FIG. 4, making it difficult to perform the work.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a receptacle for optical communication that solves the above problems and allows a cylindrical lens to be safely and easily attached to a receptacle body while adjusting the position of the lens.

[Structure of the invention]

In order to achieve the above object, the present invention provides at least two guide holes for inserting a guide rod used for adjusting the lens position when mounting a lens unit on the outer surface of a disk fixed to the outer circumference of a cylindrical lens. It is designed to be formed symmetrically.

[Explanation of Examples]

Embodiments of the present invention will be specifically described below based on the drawings.

FIG. 5 shows an example of a disc according to the present invention, and this example has guide holes 2b and 2 on both sides of a lens loose fitting hole 2a as shown in the figure.
b, and the fixation to the cylindrical lens is the same as the conventional one.

FIG. 6 shows a lens unit in which the disk 2 shown in FIG. 5 is fixed to a cylindrical lens is attached to the receptacle body, and one end is fixed to the base 4a with the same spacing as the spacing between the two guide holes 2b, 2b. It consists of two elastic guide rods 4b, 4b whose tips are bent into an L-shape. The thickness of the guide rod 4b is made slightly thinner than the diameter of the guide hole 2b, and the length of the curved tip portion 4C is made slightly shorter than the depth of the guide hole 2b. Easy to attach and remove.

FIG. 7 shows the guide tool 4 fitted to the lens unit in which the disk 2 is fixed to the cylindrical lens 1. As mentioned above, the guide rod 4b tends to be elastic, and the guide hole 2b
are located on both sides of the loose fitting hole 2a, so the disc 2 can be moved while contacting the receptacle body. Further, as is clear from this figure, in the case of the present invention, the guide tool 4 does not touch the lens and does not obscure the disc.

Therefore, there is no risk of damaging the lens during the work of fixing the lens unit to the receptacle body, and the adhesion work is also easy.

FIG. 8 shows an example of the optical communication receptacle of the present invention, which is completed by fixing a lens unit to the receptacle body 5.

Although the above embodiment shows the case where two guide holes are provided, if three guide holes are provided and three guide rods are provided as shown in Fig. 9, the fixation will be more stable and the mounting ◎ [Effects of the Invention] As explained above, the optical communication receptacle (5) of the present invention can safely and easily position the cylindrical lens. It can be adjusted and attached to the Kotobuki Garari receptacle body. Therefore, according to the present invention, it is possible to provide a high quality and low cost optical communication receptacle.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of the optical path in which light emitted from an optical fiber passes through a cylindrical lens and becomes parallel light; Fig. 2 is a perspective view showing a conventional example of a lens unit in an optical communication receptacle; and Fig. 3
The figure is a perspective view of the guide plate used when attaching the lens unit of Figure 2 to the receptacle body, and Figure 4 is a perspective view of the guide plate of Figure 3 inserted into the lens unit of Figure 2. FIG. 5 is a perspective view of a disk showing an embodiment of the present invention, FIG. 6 is a perspective view showing an example of a guide tool for adjusting the lens position used when attaching the lens unit to the receptacle body of the present invention, 7 is a perspective view showing a state in which the guide tool shown in FIG. 6 is engaged with the lens unit to which the disk shown in FIG. 5 is fixed, and FIG. 8 shows an embodiment of the receptacle for optical communication according to the present invention. 6) Cross-sectional view and FIG. 9 are perspective views showing other embodiments of the disc in the present invention. DESCRIPTION OF SYMBOLS 1... Cylindrical lens, 2... Disc, 2a... Lens loose fitting hole, 2b... Guide hole, 4... Guide tool, 4a...
・Base body, 4b... Guide rod, 4C... Tip mortar part, 5
...Resezotackle body. (7) Figure 1 Figure 2 Figure 6 Figure 7 Figure 9 Figure 8

Claims (1)

[Claims] In the receptacle for optical communication, the optical communication receptacle is configured by attaching to the receptacle body a lens unit consisting of a cylindrical lens that converts light emitted from an optical fiber into parallel light and a disk fixed to the outer periphery of the cylindrical lens. A receptacle for optical communication, characterized in that at least two guide holes for inserting guide rods used for lens position adjustment when mounting a lens unit are symmetrically formed on the outer surface of the disc.