Plastic lens optical structure capable of monitoring backlight
By integrating a semi-transparent glass sheet and a VCSEL chip into an optical communication plastic lens, the optical path design is simplified, solving the problems of complex structure and high optical power loss in existing optical communication plastic lenses, and achieving low-cost optical monitoring effects.
Patent Information
- Application Number
- CN202423202678.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-24
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-12-24
AI Technical Summary
Existing optical communication plastic lenses have complex structures, high optical power loss, and high costs. Existing MPD monitoring methods are independent and expensive, making it difficult to effectively monitor the working status of optical modules.
Design a plastic lens optical structure including a lens body, an MPD chip, and a VCSEL chip. The lens body contains a semi-transparent glass plate, and the laser beam achieves optical signal distribution through reflection and transmission, simplifying the optical path and reducing optical power loss.
It achieves a compact, rationally designed, and low-cost optical structure that can effectively monitor backlight, reduce optical power loss, and improve troubleshooting efficiency.
Smart Images
Figure CN223526546U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to optical fiber connection lens, especially a kind of plastic lens optical structure of monitorable backlight. BACKGROUND
[0002] Optical communication plastic lens is commonly used in data communication optical module, is the key core material of data communication optical module, and the structure characteristics of optical communication plastic lens directly determine the key of optical module data transmission performance, but in the application and use process of actual optical module, in addition to the basic function of optical signal transmission, it also needs to judge whether optical module works normally, for this, MPD chip is generally used in present market, MPD chip can be used for fault diagnosis of optical module, when optical module fails, the optical power and other parameters monitored by MPD will change, by analyzing the data monitored by MPD, it can help technician to quickly locate fault point, for example, if MPD monitors that the received optical power is zero, it may be that optical fiber is broken or optical receiver fails, technician can carry out targeted inspection and maintenance according to this information, improve the efficiency of troubleshooting, however, the existing MPD monitoring mode is generally to set independent optical structure to split light, not only structure is complex, but also cost is higher, and optical power loss is also larger. SUMMARY
[0003] The utility model provides a kind of plastic lens optical structure of monitorable backlight to solve the technical problems of prior art, and the structure is compact, optical path design is reasonable, optical power loss is small, and cost is lower.
[0004] To solve the above technical problems, the utility model adopts the following technical scheme.
[0005] A kind of plastic lens optical structure of monitorable backlight, it includes lens body, MPD chip and VCSEL chip, the front end of the lens body is equipped with the front lens portion corresponding with optical fiber, the bottom surface of the lens body is equipped with lower notch, the front lens portion is aligned with the lower notch, the lower notch is fixed with half-transmission glass sheet, the upper end of the half-transmission glass sheet is inclined backward, the MPD chip is below the half-transmission glass sheet, the top surface of the lens body is equipped with upper notch, the upper notch is located at the rear side of lower notch, the bottom of the upper notch is formed with reflecting surface, the upper end of the reflecting surface is inclined forward, the VCSEL chip is below the reflecting surface, the laser beam emitted by the VCSEL chip is reflected to the rear side of the half-transmission glass sheet by the reflecting surface, part of the laser beam is reflected to the MPD chip by the half-transmission glass sheet, another part of the laser beam is sequentially passed through the half-transmission glass sheet and the front lens portion and then is shot into the optical fiber.
[0006] Preferably, a front end of the lens body is provided with a connecting port.
[0007] Preferably, a front side wall of the lower notch is formed with a first optical bevel part, and an upper end of the first optical bevel part is inclined rearward.
[0008] Preferably, a rear side wall of the lower notch is formed with a second optical bevel part, and an upper end of the second optical bevel part is inclined forward.
[0009] Preferably, a support is fixed in the lower notch, and the semi-transmissive glass sheet is fixedly attached to the support.
[0010] Preferably, a bottom of the lens body is provided with a bottom lens part corresponding to the VCSEL chip.
[0011] In the plastic lens optical structure capable of monitoring backlight, the lens body is an integrally formed structure, the overall structure is simpler, and the application cost is low, the MPD chip and the VCSEL chip are both installed below the lens body, the semi-transmissive glass sheet is a glass sheet that is semi-transmissive and semi-reflective, and is used for transmitting part of light signals and reflecting another part of light signals, when the VCSEL chip emits a laser beam, the laser beam is reflected to the rear side of the semi-transmissive glass sheet through the reflecting surface, under the semi-transmissive and semi-reflective action of the semi-transmissive glass sheet, part of light of the laser beam is reflected to the MPD chip through the semi-transmissive glass sheet, and another part of light of the laser beam sequentially passes through the semi-transmissive glass sheet and the front lens part, and then is shot into the optical fiber, based on the above structure, when the VCSEL chip emits a laser signal, the MPD chip can collect the laser signal, and then MPD backlight monitoring is realized, compared with the prior art, the plastic lens optical structure not only has reasonable light path design, but also has smaller optical power loss, and better application requirements are met. BRIEF DESCRIPTION OF DRAWINGS
[0012] Figure 1 It is a perspective view of the plastic lens optical structure of the utility model Figure 1 ;
[0013] Figure 2 It is a perspective view of the plastic lens optical structure of the utility model Figure 2 ;
[0014] Figure 3 It is a front view of the plastic lens optical structure of the utility model
[0015] Figure 4 It is Figure 3 a sectional view along line A-A
[0016] Figure 5 It is a light path schematic view of the plastic lens optical structure of the utility model. Detailed Implementation
[0017] The present invention will now be described in more detail with reference to the accompanying drawings and embodiments.
[0018] This utility model discloses a plastic lens optical structure for monitoring backlight, combined with Figures 1 to 5 As shown, it includes a lens body 1, an MPD chip 2, and a VCSEL chip 3. The front end of the lens body 1 has a front lens portion 4 corresponding to the optical fiber 100. A recess 5 is formed on the bottom surface of the lens body 1. The front lens portion 4 is aligned with the recess 5. A semi-transparent glass plate 6 is fixed inside the recess 5. The upper end of the semi-transparent glass plate 6 is tilted backward. The MPD chip 2 is located below the semi-transparent glass plate 6. An upper recess 7 is formed on the top surface of the lens body 1. Located behind the lower recess 5, the bottom of the upper recess 7 forms a reflective surface 8, the upper end of the reflective surface 8 is tilted forward, the VCSEL chip 3 is disposed below the reflective surface 8, the laser beam emitted by the VCSEL chip 3 is reflected by the reflective surface 8 to the rear side of the semi-transparent glass plate 6, part of the laser beam is reflected by the semi-transparent glass plate 6 to the MPD chip 2, and the other part of the laser beam passes through the semi-transparent glass plate 6 and the front lens part 4 in sequence before entering the optical fiber 100.
[0019] In the above structure, the lens body 1 is a one-piece molded structure, which is simpler in overall structure and has a lower application cost. The MPD chip 2 and VCSEL chip 3 are both installed below the lens body 1. The semi-transparent glass plate 6 is a semi-transparent and semi-reflective glass plate, which is used to transmit part of the light signal and reflect the other part. When the VCSEL chip 3 emits a laser beam, the laser beam is reflected by the reflective surface 8 to the rear side of the semi-transparent glass plate 6. Under the semi-transparent and semi-reflective effect of the semi-transparent glass plate 6, part of the laser beam is reflected by the semi-transparent glass plate 6 to the MPD chip 2, and the other part of the laser beam passes through the semi-transparent glass plate 6 and the front lens part 4 in sequence, and then enters the optical fiber 100. Based on the above structure, when the VCSEL chip 3 emits a laser signal, the MPD chip 2 can collect the laser signal, thereby realizing MPD backlight monitoring. Compared with the prior art, this utility model not only has a reasonable optical path design, but also has less optical power loss, which better meets the application requirements.
[0020] To better match the optical fiber 100, in this embodiment, in combination with Figure 1 and Figure 4As shown, the front end of the lens body 1 is provided with a connecting port 9, and the end of the optical fiber 100 extends into the connecting port 9.
[0021] As a preferred mode, the front side wall of the lower notch 5 is formed with a first optical bevel part 10, and the upper end of the first optical bevel part 10 is inclined backward. Further, the rear side wall of the lower notch 5 is formed with a second optical bevel part 11, and the upper end of the second optical bevel part 11 is inclined forward. Wherein, the first optical bevel part 10 and the second optical bevel part 11 are directly formed on the lens body 1, and the angle of the bevel can be adjusted according to the design parameters.
[0022] Further, the bottom of the lens body 1 is provided with a bottom lens part 13 corresponding to the VCSEL chip 3. Wherein, the front lens part 4 and the bottom lens part 13 can be designed as aspheric surfaces.
[0023] In this embodiment, the lower notch 5 is fixed with a support 12, and the semi-transmissive glass sheet 6 is fixedly attached to the support 12. In actual application, the semi-transmissive glass sheet 6 can be processed by bonding a semi-transmissive film layer on a transparent glass sheet, which has simple structure and low application cost.
[0024] In actual application, the divergent light emitted from the VCSEL chip is formed into near-collimated light by the bottom lens, and then the near-collimated light is totally reflected by the reflecting surface, passes through the optical bevel and the glass sheet, and then passes through the optical bevel to reach the front lens, and then the near-collimated light is focused by the front lens to be injected into the optical fiber, thereby completing the connection of the chip to the fiber light. At the same time, the divergent light emitted from the VCSEL chip passes through the glass sheet and then is formed into near-collimated light by the bottom lens, and then the near-collimated light is totally reflected by the reflecting surface, passes through the optical bevel, and then is reflected from the front and rear surfaces of the glass sheet, and the reflected light enters the lower MPD chip at a certain angle, thereby realizing the MPD back light monitoring.
[0025] The above is only the preferred embodiment of the present application, and is not used to limit the present application, and any modification, equivalent replacement or improvement within the technical scope of the present application shall be included in the scope of the present application.
Claims
1. A plastic lens optical structure with a monitorable backlight, characterized in that, The lens body (1), the MPD chip (2) and the VCSEL chip (3) are included, the front end of the lens body (1) is provided with a front lens part (4) corresponding to an optical fiber (100), the bottom surface of the lens body (1) is provided with a lower notch (5), the front lens part (4) is aligned with the lower notch (5) front and back, the lower notch (5) is fixed with a semi-transmissive glass sheet (6), the upper end of the semi-transmissive glass sheet (6) is inclined backward, the MPD chip (2) is arranged below the semi-transmissive glass sheet (6), the top surface of the lens body (1) is provided with an upper notch (7), the upper notch (7) is located on the rear side of the lower notch (5), the bottom of the upper notch (7) is formed with a reflecting surface (8), the upper end of the reflecting surface (8) is inclined forward, the VCSEL chip (3) is arranged below the reflecting surface (8), the laser beam emitted by the VCSEL chip (3) is reflected to the rear side of the semi-transmissive glass sheet (6) through the reflecting surface (8), part of the laser beam is reflected to the MPD chip (2) through the semi-transmissive glass sheet (6), and the other part of the laser beam is sequentially transmitted through the semi-transmissive glass sheet (6) and the front lens part (4) and then enters the optical fiber (100).
2. The plastic lens optical structure with a monitorable backlight as claimed in claim 1, wherein, The front end of the lens body (1) is provided with a connecting port (9).
3. The plastic lens optical structure with a monitorable backlight as claimed in claim 1, wherein, The front side wall of the lower notch (5) is formed with a first optical inclined surface part (10), and the upper end of the first optical inclined surface part (10) is inclined backward.
4. The plastic lens optical structure with a monitorable backlight of claim 1, wherein, The rear side wall of the lower notch (5) is formed with a second optical inclined surface part (11), and the upper end of the second optical inclined surface part (11) is inclined forward.
5. The plastic lens optical structure with a monitorable backlight of claim 1, wherein, The lower notch (5) is fixed with a support (12), and the semi-transmissive glass sheet (6) is fixed on the support (12).
6. The plastic lens optical structure with a monitorable backlight of claim 1, wherein, The bottom of the lens body (1) is provided with a bottom lens part (13) corresponding to the VCSEL chip (3).