TWI220599B - Lens type emitting module in optical transmission-reception module - Google Patents

Abstract

A lens type emitting module in the optical transmission-reception module is disclosed, which comprises: a light-receiving device; a light-emitting device installed on the light-receiving surface of the light-receiving device; and a convex light-focusing mask made of a translucent material, it has a tray part disposed across the light-receiving surface of the light-receiving device, the top surface of the tray part has a protrusion part, the protrusion part is about in a hemispherical shape. The bottom surface of the tray part has a concave cavity, so as to fit to and dispose the light-emitting device inside it. The concave cavity is projected and aligned to the lower part of the protrusion part. Thus, the light emitted from the light-emitting device is condensed and incident onto the inlet of fiber, so that one part of light beam returned to the light-emitting device does not irradiate onto the light-emitting device, or is too small to interfere with the light-emitting device.

Description

1220599 V. Description of the invention (1) 1. [Technical field to which the invention belongs]

The present invention relates to a lens-type transmitting module in a bidirectional optical transceiver module, in particular to a convex-type light-condensing package packaged on the light-receiving surface side of the light-emitting element to condense the light beam emitted by the light-emitting element. It is directed to an optical fiber entrance and prevents the light beam emitted by the light emitting element from returning to the light emitting element. 2. [Previous Technology] Currently used in two-way transmission optoelectronic transceiver modules, such as US Patent No.

6, 188,495 "OPTICAL TRANSMISSION-RECEPTION

"APPARATUS", in the disclosed module, it mainly contains an optical fiber (11), a light-emitting element (3), a reflective sheet (6) and a light-receiving element (4), and the optical fiber (11) A lens (8) can be arranged between the light receiving element (4) and the reflecting sheet (6) can reflect the light beam generated by the light emitting element (3) toward the entrance of the optical fiber (11), and can pass the optical fiber (11) 1 丨) The emitted light beam is refracted toward the light receiving element (4) to be converted into an electronic signal and output outward. Although the above structure can refract the output light beam and the input light beam to different positions through the reflection of the reflecting sheet to achieve the purpose of bidirectional transmission, it has the following disadvantages:

1. The device (3) and the light-receiving element (4) must be installed in different positions, which is very troublesome to install and increase production troubles. 2. The reflection sheet (6) for the light beam is very precise, so the unit price is not high, which causes the cost of the product to increase greatly, and it is difficult to be universally accepted by the market. 3. Because the light beam must be refracted to a certain correct position, therefore On installation,

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The relative position of each component must also be extremely accurate, thus increasing the difficulty of manufacture ', making the product yield rate unable to effectively improve, and showing its shortcomings. In view of this, the inventor of the present case has made research and finally revealed a lens-type transmitting module that should be used in a bidirectional optical transceiver module. [III] [Content of the invention] The purpose of the mirror-emitting mode of the present invention is to group, including the disk portion of the light-receiving surface of the light-receiving element, to provide a double: a light-receiving element; and a material containing a unidirectional optical element > ^ — The top surface of the convex poly-disc portion is within the disc portion, and the return light emitted by the light element is reduced so as not to cause the formula of the present invention. A beam projected by a concave projection to converge the light beam directed toward the element is preferably shown clearly to the light emitting element. Method] When receiving the light-receiving element, make the convex part slightly concave, so as to kiss the convex part, so as not to cause interference with the photo. Cover, the hair is placed on the hemispherical surface of the light surface, if it is a mouth, the light element device is made of light transmission and is in the shape, and the light element is a part of the hair, or has been described and described below The attached drawings are as shown in the first to third drawings. The present invention relates to a lens-type transmitting module (100) in a bidirectional optical transceiver module, which includes: a light receiving element (I); a light emitting element ( 2) installed on the light-receiving surface (II) of the light-receiving element (丨); and a convex light-concentrating cover (3) 'made of a light-transmitting material, containing a disk portion (31), straddling the light-receiving element A convex portion (32) is protruded on the light receiving surface (I) of the element (1) and a top surface of the plate portion (31), so that the convex portion (π) is slightly

Page 6 1220599 V. Description of the invention (3) Hemispherical shape, and a recess (33) is recessed in the bottom surface of the plate portion (31) to fit the light-emitting element (2) in a fit, and The projection of the cavity (3 3) is aligned below the convex portion (32). If the light beam (L2) emitted by the light-emitting element (2) is focused toward an entrance (41) of an optical fiber (4) , So that a part of the light beam that returns to the light-emitting element (2) is not irradiated to the light-emitting element (2), or has been so small as not to cause interference with the light-emitting element (2). The light receiving element (1) described above may be a photodiode (PD: Photodiode). When the photodiode is irradiated, the electrons in the covalent bond absorb light energy and detach, generating free electrons and holes. So that the reverse current generated by the photo-polar body increases with the increase of the absorbed light energy, so as to generate different output signals' output from a terminal (12). The light-emitting element (2) installed on the light-receiving element (1) may be taken from a light-emitting diode (LED), but the present invention is not limited thereto. As shown in the first, second and third figures, the convex light-concentrating cover (3) disclosed in the present invention can be made of transparent materials such as glass and plastic, and the present invention is not limited in this respect. The convex portion (32) of the convex condenser (3) defines a central axis (30), so that the central axis (30) is projected to align with the center of the light emitting element (2), and an optical fiber The entrance (41) of (4), when the light emitting element (2) is triggered to emit a light beam (L2) to the outside, 'the light beam (L2) will converge toward the center when passing through the spherical surface of the convex portion (32). It is directed to a predetermined position, that is, the entrance of the optical fiber (4) and (41). The above-mentioned convex split condenser (3) 'The recess (33) recessed at the bottom end can be an arc surface Or straight, the invention is not limited. At the intersection of the disk portion (31) and the convex portion (32) of the convex condenser (3) described above

Page 7 1220599 V. Description of the invention (4) At the junction, a V-shaped groove (34) [other shapes are also possible] is recessed, so that after the light emitting element (2) emits light, a part of it is returned. The light beam (L2) turned back to the light-emitting element (2) is not irradiated to the light-emitting element (2), or has been so small as not to cause interference to the light-emitting element (2). As the lens-type transmitting module (100) of the bidirectional optical transceiver module disclosed in the present invention, the light-emitting element (2) can be greatly reduced by the outside due to the sealing of the convex light-concentrating cover (3). Therefore, the present invention can directly install the lens element (1) in the application, and the light beam (L2) projected by the light emitting element (2) can be directly irradiated. The entrance (41) to the optical fiber (4), that is, there is no need to install a diamond mirror or a refractive plate between the optical fiber (4) and the light receiving element (1) and the cultural light element (2). Refraction to different positions allows the two-way optical transceiver module to be manufactured without the use of extremely expensive parts such as a prism or a refraction sheet, so that the manufacturing cost of the two-way optical transceiver module using the present invention can be greatly reduced. The lens-type transmitting module in the bi-directional optical transceiver module disclosed in the present invention can be applied and implemented in a bi-directional optical transceiver module as shown in the third figure, which makes the lens of the present invention with a convex condenser The transmitting module (100) is mounted on the first end of a body (5), so that the second end of the body (5) is socketed with a connector (51) to an optical fiber (4), and the optical fiber (4 The entrance (41) of) is axially aligned with the central axis (30) of the convex portion (3 2) of the convex condenser (3). For example, when the optical fiber (4) emits the light beam (li) toward the present invention, The light beam can pass through the disc portion (31) of the convex condenser (3) and be directed to the light receiving element (1) to be converted into an electronic signal for external output, and when the light emitting element (2) is triggered

1220599 V. Description of the invention (5), the first light beam (L2) is emitted from the light emitting element (2), and the light beam is focused on the light beam after passing through the convex type " The entrance (41) of the optical fiber (4) follows the optical fiber to output a signal outward, and is a (Duplex) optical transceiver module. In addition, the lenses in the two-way optical transceiver module disclosed by the present invention can be applied to transmission of digital cameras, cameras, nets, etc., and its application range is not limited by the present invention.彳 Audiovisual or δί1 The transmission module in the two-way optical transceiver module shown in the present invention can be repaired without departing from the spirit and scope of the present invention, and is not self-limiting. Which application the present invention does

Page 9 1220599 Brief description of the drawings 5. [Simplified description of the drawings] The first picture: a schematic diagram of the structure of the present invention. The second figure is a schematic sectional view of the structure of the present invention. The third figure is a schematic diagram showing an application example of the present invention. [Simple description of component symbols] (1) Light receiving element (12) Terminals (3) Convex condenser (3 1) Disk (33) Cavity (4) Optical fiber (5) Body (L1) Beam (1 0 0 ) Lens-type emission module (11) Light-receiving surface (2) Light-emitting element (30) Central axis (3 2) Convex portion (34) V-ring groove (41) Entrance (5 1) Connector (L2) Beam

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Claims (1)

1220599 VI. Application for patent scope '1. A lens-type transmitting module in a bidirectional optical transceiver module, which includes: a light receiving element; > " " " " Concentrating hood, made of light-transmitting material, containing a disk portion, straddling the light receiving surface of the light receiving element, and protrudingly protruding on the top surface of the disk portion, so that the convex portion has a semi-spherical shape. A recess is recessed on the bottom surface of the disc portion, so that the light-emitting element is fitted inwardly, and the projection of the recess is aligned below the convex portion. The lens-type transmitting module in the bi-directional optical transceiver module described above, wherein the convex light-concentrating cover is made of glass. 3. The lens-type transmitting in the bi-directional optical transceiver module described in item i of the patent application scope Module, in which the light receiving element is a photodiode. 4 · The lens emitting module in the bi-directional optical transceiver module described in the first item of the patent application scope, wherein the light emitting element is a light emitting diode Polar body (LED) 5. If applying for a patent The lens-type transmitting module of the bidirectional optical transceiver module according to the first item, wherein the convex portion of the convex condenser is defined with a central axis, so that the projection of the central axis is aligned with the center of the light emitting element and The projection is aligned with the entrance of a fiber. 6. The lens-type transmitting module in the two-way optical transceiver module described in the first item of the patent application scope, wherein the convex condenser is on the disk portion and the convex portion. At the junction, the ring groove is recessed. 7 · —A kind of bidirectional optical transceiver module 'is an order such as the first patent application scope 1220599 Page 12