Lens assembly for eyesight detection
A lens assembly and vision detection technology, which is applied in the field of vision detection to avoid inaccurate detection, ensure inspection results, and achieve clear images.
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Embodiment 1
[0024] The present invention provides a lens assembly for vision detection, referring to figure 1 , figure 2 , as a specific embodiment, the lens assembly includes a box body 1, the box body 1 is provided with a detection port 10 communicating with the inside of the box body 1, and the box body 1 is provided with an icon assembly 2, a plane Mirror 11, semi-transparent mirror 12 and concave mirror 13, said icon assembly 2 includes a display screen 21 for displaying a detection icon, the reflective surface of said plane mirror 11 is arranged facing said display screen 21 and the The reflective surface 110 can reflect the light emitted by the display screen 21 to the concave reflector 13, and the half-transparent mirror 12 is arranged on the light path reflected by the reflective surface 110 and can reflect the concave reflector 13. 13 reflects the reflected light to the port 10.
[0025] By setting the display screen to display the detection icon, and passing the light to the...
Embodiment 2
[0037] Further, refer to image 3 , the present invention provides a lens assembly for visual acuity detection also includes a control system, the control system includes:
[0038] A storage module, the storage module is used to store image information of various icons, and is used to store "program information for adjusting the adjustment mode of the first linear adjustment component and the second linear adjustment member";
[0039] An adjustment module, including an adjustment handle, used to allow the inspector to adjust the size of the icon;
[0040] The execution module obtains the adjustment information of the adjustment module and transmits it to the storage module, and adjusts the first linear adjustment component and the second linear adjustment member according to the "adjustment" stored in the storage module. The program information of the mode” makes the first linear adjustment assembly and the second linear adjustment member work, thereby adjusting the distance ...
Embodiment 3
[0046] refer to Figure 4 , the present invention also provides a kind of method that adopts lens assembly to detect visual acuity, and this method comprises the following steps:
[0047] Step 1. The inspector observes one eye through the detection port, and blocks the other eye, and randomly displays icons through the display screen. The icons displayed on the display screen are transmitted to the detection port;
[0048] Step 2. The inspector chooses to manually adjust the size of the icon according to his own observation, and then answers the information of the icon or directly answers the information of the icon;
[0049] Step 3, the adjustment component adjusts the icon according to the tester's answer.
[0050] In step 2, when the inspector cannot or can clearly observe the current icon, which is quite different from his current vision, he can adjust the adjustment component by adjusting the handle, so as to adjust the size of the icon until the detection When the use...
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