CN-116871121-B - Active alignment system and method for binocular optical modules

CN116871121BCN 116871121 BCN116871121 BCN 116871121BCN-116871121-B

Abstract

The present disclosure relates to a binocular optical module active alignment system and method. The system comprises a moving mechanism, an active alignment mechanism, a curing mechanism and a curing mechanism, wherein the moving mechanism comprises a track and an objective table, the track comprises an upstream area and a downstream area, the objective table carries a binocular optical module and moves along the track, the dispensing mechanism is arranged in the upstream area and used for dispensing at a dispensing position of the binocular optical module, the active alignment mechanism is arranged above the track in the downstream area and used for obtaining an image combination detection result of the binocular optical module and adjusting relative positions between a display element and other optical elements of the binocular optical module based on the image combination detection result to enable the relative positions to meet a set standard, and the curing mechanism is used for curing the dispensing position of the binocular optical module in a state that the relative positions of the optical elements of the binocular optical module after active alignment are unchanged. The method can ensure the precision and imaging effect of the cured binocular optical module.

Inventors

LU JIE
SUN JIAPING
HOU WEIHONG
CHEN HANG
CHENG DEWEN
WANG QIWEI
HOU QICHAO

Assignees

德伽智能光电（镇江）有限公司

Dates

Publication Date: 20260508
Application Date: 20230726

Claims (6)

1. An active alignment method of a binocular optical module, which is used for dispensing, active alignment and curing of the binocular optical module, is characterized by comprising the following steps: Placing the binocular optical module formed by combining the two display elements and other optical elements on an objective table, moving the binocular optical module to a first position along a track, and dispensing the dispensing position of the binocular optical module placed on the objective table by a dispensing mechanism, wherein the dispensing position is positioned between an upper element and a lower element, the upper element comprises the display element, and the lower element comprises a bracket assembly and other optical elements arranged in the bracket assembly; The object stage moves to a second position along the track, the active alignment mechanism acquires a binocular imaging result of the binocular optical module, and actively aligns a display element and other optical elements in the binocular optical module based on the binocular imaging result until imaging of the binocular optical module meets a set standard, the active alignment mechanism comprises an optical detection unit, a third moving unit, two absorption execution units and two second moving units, the second moving unit drives the absorption execution units to move above the display element and absorb the display element through a sucker, the third moving unit drives an imaging data acquisition device to a monitoring position, and the imaging data acquisition device monitors imaging data of the binocular optical module in real time; And the fourth moving unit drives the curing lamp to the second position and irradiates towards the dispensing position, and the dispensing area in the binocular optical module positioned at the second position is irradiated and cured by the curing lamp so as to fix the aligned display element and other optical elements.
2. The method of claim 1, wherein the dispensing position of the binocular optical module placed on the stage by the dispensing mechanism includes the dispensing position obtaining unit obtaining a dispensing position of the binocular optical module, the first moving unit driving the dispensing executing unit to move until the dispensing output port corresponds to the dispensing position, and the UV adhesive is output from the dispensing output port.
3. The method of claim 1, further comprising cutting off the suction by the suction actuator after the curing is completed, and resetting the suction actuator by the second moving unit.
4. A binocular optical module active alignment system for implementing the binocular optical module active alignment method of any one of claims 1 to 3, comprising: The moving mechanism comprises a track and an objective table, wherein the track comprises an upstream area and a downstream area, and the objective table is used for bearing the binocular optical module formed by combining the display element and other optical elements and moves along the track; The dispensing mechanism is arranged in the upstream area to dispense glue at the dispensing position of the binocular optical module; The active alignment mechanism is positioned above the track in the downstream area and is used for acquiring the combined image detection result of the binocular optical module and adjusting the relative positions among the elements of the binocular optical module based on the combined image detection result to enable the relative positions to meet the set standard; the active alignment mechanism comprises an optical detection unit, a third moving unit, two sucking execution units and two second moving units, wherein the optical detection unit is used for monitoring imaging data of a binocular optical module when a screen of the binocular optical module is lightened in real time and acquiring a combined image detection result of the binocular optical module, the optical detection unit comprises two imaging data acquisition devices, the third moving unit is connected with the imaging data acquisition devices and provided with an axis moving in the front-back direction and can drive the imaging data acquisition devices to move in the front-back direction, the two sucking execution units respectively comprise sucking discs and are used for sucking two display elements in the binocular optical module and providing adsorption force in the active alignment and solidification process, and the two second moving units are respectively connected with the sucking execution units and drive the display elements to move so as to generate relative displacement with other optical elements in the binocular optical module; The curing mechanism is arranged in an aligned manner with the position of the joint of the actively aligned binocular optical module, which is provided with the dispensing, so as to cure the dispensing position of the binocular optical module under the condition that the binocular optical module is not moved and the relative position between the elements of the actively aligned binocular optical module is kept unchanged; and the main controller is respectively and electrically connected with the moving mechanism, the dispensing mechanism, the active alignment mechanism and the curing mechanism so as to control the movement of the binocular optical module and the execution of the dispensing action, the active alignment action and the curing action.
5. The binocular optical module active alignment system of claim 4, The curing mechanism includes: the curing lamp comprises a plurality of rows of lamp bodies, and each lamp body in each row of lamp bodies corresponds to one dispensing position; And the fourth moving unit is connected with the curing lamp and provided with a shaft moving along the horizontal direction, and can drive the curing lamp to move along the horizontal direction.
6. The binocular optical module active alignment system of claim 4, wherein the dispensing mechanism comprises: The dispensing position acquisition unit is used for acquiring the appearance image of the binocular optical module and identifying the dispensing position from the appearance image; The dispensing execution unit comprises a dispensing output port, is arranged towards the lower side and is used for outputting UV (ultraviolet) glue; the first moving unit is respectively connected with the dispensing position obtaining unit and the dispensing executing unit, and is used for driving the dispensing position obtaining unit to move so as to determine the dispensing position and driving the dispensing executing unit to move to the dispensing position.

Description

Active alignment system and method for binocular optical modules Technical Field The disclosure belongs to the field of optical device processing and manufacturing, and particularly relates to a binocular optical module active alignment system and a binocular optical module active alignment method. Background The head-mounted display device is composed of an optical module for imaging and a bracket as a carrier. Currently, most of the head-mounted display devices are composed of two monocular optical modules, and each monocular optical module includes a monocular optical lens and a screen. For the binocular optical module, an important index needs to be detected in the assembly process, namely, binocular imaging degree, if binocular imaging effect is poor, a user can feel that pictures of left eyes and right eyes cannot be overlapped, and further the head display equipment cannot be normally used, and visual fatigue of the user can be easily caused because the pictures do not accord with the bearing range of the user. Therefore, the image combining accuracy of the head-mounted display device greatly affects the product display quality and the user experience. For the production of optical devices, AA processes are a necessary condition to ensure the accuracy of the optical components. The AA process, ACTIVE ALIGNMENT, active alignment, is a technique for determining the relative position of parts during assembly. In the prior art, the fixed connection between the optical elements for the binocular optical module is usually achieved through active alignment, dispensing and curing steps, which are usually done in different areas. After the active alignment is finished, the dispensing area is dispensed, the relative position of the optical elements after the active alignment cannot be kept unchanged, the relative position between the optical elements can be changed due to the flowability of the UV adhesive during dispensing, and if small deviation exists in the process of moving to the curing area after dispensing, the relative displacement between the two optical elements after the active alignment is possibly caused, so that the precision of the finally cured optical assembly is affected. Accordingly, there is a need to provide an active alignment system and method that can achieve high precision assembly of binocular optical modules. Disclosure of Invention The present disclosure is made in view of the above-mentioned needs of the prior art, and the technical problem to be solved by the present disclosure is to provide an active alignment system and method for a binocular optical module, so as to improve the accuracy and performance of the assembled binocular optical module. In order to solve the above problems, the technical solution provided by the present disclosure includes: The invention provides an active alignment system of a binocular optical module, which comprises a moving mechanism, an active alignment mechanism, a curing mechanism and a main controller, wherein the moving mechanism comprises a track and an objective table, the track comprises an upstream area and a downstream area, the objective table is used for carrying the binocular optical module after combination of a display element and other optical elements and moving along the track, the dispensing mechanism is arranged in the upstream area to dispense glue at the glue dispensing position of the binocular optical module, the active alignment mechanism is arranged above the track of the downstream area and used for acquiring an image combination detection result of the binocular optical module and adjusting the relative position among elements of the binocular optical module based on the image combination detection result to enable the relative position among the elements of the binocular optical module to meet a set standard, the curing mechanism is arranged in the downstream area and is in alignment with the position of the joint of the binocular optical module with glue after active alignment so as to cure the glue dispensing position of the binocular optical module under the state that the relative position among the elements of the binocular optical module after active alignment is unchanged, and the main controller is respectively connected with the moving mechanism, the active alignment mechanism, the curing mechanism and the active alignment mechanism to perform the active alignment and the active alignment actions. Through the arrangement, the steps of dispensing, active alignment and curing are sequentially carried out when the optical elements are combined, and the active alignment and curing process is arranged at the same position so as to directly carry out curing after the active alignment is carried out, so that the alignment precision can be ensured, and the precision and imaging effect of the optical module are ensured. Preferably, the active alignment mechanism comprises an optical detection unit, wherein the optical d