JP2000243982A - Optical communication transceiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize a device and simplify an entire shape by providing a condensation lens part consisting of a plurality of concentric divided spherical surfaces at the outer surface part of the light passage part of a package for transmitting the incidence/emission light of a light-emitting device. SOLUTION: A light-emitting device 1, a photo detector 2, and a peripheral circuit are subjected to mold sealing into a package 3 made of plastic integrally. The light-emitting device 1 and the photo detector 2 are used for transmitting and receiving signals, respectively. Then, a light passage 4 for passing light emitted from the light-emitting device 1 and light entering the light-emitting device is formed at the package 3, and at the same time the light passage 4 and a condensation lens 5 are formed in one piece with the package 3. Then, the condensation lens 5 is formed at the outer surface of the light passage 4. The condensation lens 5 (diameter ranges from 2 to 4 mm) consists of 5 to 15 concentric divided spherical surfaces 5a, thus miniaturizing a device and simplifying an entire shape and also eliminating the need for a taping material with a complex shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical communication transceiver for communicating using an optical signal such as infrared light.

[0002]

2. Description of the Related Art Conventionally, optical communication transceivers shown in FIGS. 6 and 7 have been known. This conventional optical communication transceiver comprises a light emitting element, a light receiving element, a peripheral circuit connected to the light emitting element and the light receiving element, a package 101 containing the light emitting element, the light receiving element and the peripheral circuit. A light-passing portion of the package for transmitting light emitted from the light-emitting device and light incident on the light-receiving device; and a dome-shaped condenser lens 102 disposed on an outer surface of the light-passing portion. And In a conventional optical communication transceiver, peripheral circuits such as a light emitting element, a light receiving element, and a preamplifier are molded and sealed in a plastic package 101 by integral molding. At this time, the condensing lens 102 is formed by making the outer surface of the light passing portion into a dome shape.

[0003]

However, in the conventional optical communication transceiver, the dome-shaped condenser lens 102 protrudes from the outer surface of the light passage portion of the package, so that the package is large and the shape is complicated. There is a problem that there is. Further, in the conventional optical communication transceiver, handling is inconvenient because the shape is complicated, and particularly, a problem that a taping material having a complicated shape is necessary when trying to store it in a taping material or stably storing it. There is.

[0004] It is an object of the present invention to provide an optical communication transceiver which can be reduced in size and which can be formed into a simple shape as a whole.

[0005]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises a light-emitting element, a light-receiving element,
In an optical communication transceiver including a peripheral circuit connected to the light emitting element and the light receiving element, and a package containing the light emitting element, the light receiving element, and the peripheral circuit, light emitted from the light emitting element and A light-passing portion of the package for passing light incident on the light-receiving element; and a condensing lens portion formed of a plurality of concentric divided spherical surfaces formed on an outer surface portion of the light-passing portion. I do.

According to a second aspect of the present invention, in the first aspect of the present invention, the condenser lens portion is formed of 5 to 15 concentric divided spherical surfaces.

According to a third aspect of the present invention, in the first aspect, the light emitting element emits infrared light.
The light receiving element is characterized by receiving and detecting infrared rays.

According to a fourth aspect of the present invention, a light emitting element, a light receiving element, a peripheral circuit connected to the light emitting element and the light receiving element, and the light emitting element, the light receiving element and the peripheral circuit are housed. An optical communication transceiver comprising a package, a light-passing portion of the package for passing light emitted from the light-emitting element and light incident on the light-receiving element, and formed on outer surface portions of these light-passing portions. A condensing lens portion comprising a plurality of concentric divided spherical surfaces,
And a transparent plate disposed so as to cover the outside of the condenser lens portion.

A fifth aspect of the present invention is characterized in that, in the fourth aspect of the present invention, the condenser lens portion comprises 5 to 15 concentric divided spherical surfaces.

According to a sixth aspect of the present invention, in the fourth aspect, the light emitting element emits infrared light.
The light receiving element is characterized by receiving and detecting infrared rays.

[0011]

Next, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1, 2, and 3, an optical communication transceiver according to a first embodiment of the present invention is connected to a light emitting element 1, a light receiving element 2, and these light emitting elements and light receiving elements. It includes a peripheral circuit (not shown) such as a preamplifier, and a package 3 containing the light emitting element 1, the light receiving element 2, and the peripheral circuit.

As shown in FIG. 4, the package 3 is formed with a light transmitting portion 4 for transmitting light emitted from the light emitting element 1 and light incident on the light receiving element 2. A condensing lens portion 5 is formed on the outer surface of the light passing portion 4. The condenser lens section 5 is composed of a plurality of concentric divided spherical surfaces 5a. The diameter of the condenser lens portion 5 is 2 to 4
mm. The condenser lens portion 5 is preferably composed of 5 to 15 concentric divided spherical surfaces 5a.

The light-emitting element 1, the light-receiving element 2, and the peripheral circuit are integrally molded in a package 3 made of plastic. The light emitting element 1 is used for transmission. The light receiving element 2 is used for reception.
The light passing section 4 and the condenser lens section 5 are formed integrally with the package 3.

Next, a second embodiment of the present invention will be described. As shown in FIG. 5, the optical communication transceiver according to the second embodiment of the present invention is arranged so as to further cover the outside of the converging lens unit 5 in the optical communication transceiver of FIGS. It has a transparent plate 6. In this optical communication transceiver, even when the condenser lens unit 5 is formed so as to be exposed to the outside of the device, the condenser plate unit 5 can be prevented from being stained by the transparent plate 6.

[0015]

According to the present invention, the size can be reduced and the whole can be made simple.

Further, according to the present invention, since the whole can be formed in a simple shape, there is no need for a complicatedly shaped taping material when housed in the taping material.

[Brief description of the drawings]

FIG. 1 is a front view showing an optical communication transceiver according to a first embodiment of the present invention.

FIG. 2 is a bottom view showing the optical communication transceiver of FIG. 1;

FIG. 3 is a left side view showing the optical communication transceiver of FIG. 1;

FIG. 4 is an enlarged sectional view showing a main part of the optical communication transceiver of FIG. 1;

FIG. 5 is an enlarged sectional view showing a main part of an optical communication transceiver according to a second embodiment of the present invention.

FIG. 6 is a front view showing a conventional optical communication transceiver.

FIG. 7 is a bottom view showing the optical communication transceiver of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Light emitting element 2 Light receiving element 3 Package 4 Light passage part 5 Condensing lens part 5a Dividing spherical surface 6 Transparent plate

Claims (6)

[Claims] 1. A light-emitting element, a light-receiving element, a peripheral circuit connected to the light-emitting element and the light-receiving element, and a package containing the light-emitting element, the light-receiving element, and the peripheral circuit. In the optical communication transceiver, a light passing portion of the package for passing light emitted from the light emitting device and light incident on the light receiving device, and a concentric circular shape formed on an outer surface portion of the light passing portion An optical communication transceiver comprising: a condensing lens unit including a plurality of divided spherical surfaces. 2. The optical communication transceiver according to claim 1, wherein the condensing lens unit is formed of 5 to 15 concentric divided spherical surfaces. 3. The optical communication transceiver according to claim 1, wherein said light emitting element emits infrared light, and said light receiving element receives and detects infrared light. 4. A light-emitting element, a light-receiving element, a peripheral circuit connected to the light-emitting element and the light-receiving element, and a package containing the light-emitting element, the light-receiving element, and the peripheral circuit. In the optical communication transceiver, a light passing portion of the package for passing light emitted from the light emitting element and light incident on the light receiving element, and concentric circles formed on outer surface portions of these light passing portions An optical communication transceiver, comprising: a condenser lens section including a plurality of divided spherical surfaces; and a transparent plate disposed so as to cover the outside of the condenser lens section. 5. The optical communication transceiver according to claim 4, wherein said converging lens portion is formed of 5 to 15 concentric divided spherical surfaces. 6. The optical communication transceiver according to claim 4, wherein said light emitting element emits infrared light, and said light receiving element receives and detects infrared light.