In the figure, mm ′ represents the plane of the combination lens, and S ′1,S ′ 2 and S ′ 3 are the intersections of the central rays of the three beams with the plane. S2o2 = u is the object distance. According to the lens imaging formula:
1u+ 1L？ u= 1f…①
Solvable:
u = 12(L2？ 4fL)
Because it is necessary to ensure that all the light refracted by the lens can converge to point P, the light of each light source cannot cross before being projected to the lens, and there must be 2utanα≤h, that is, U ≤ 2h. Take the "-"sign in the above formula and substitute it in f? And l, calculate:
u=(6？ 32)h≈ 1.757h…②
This solution meets the above conditions.
Connect three point light sources to point P respectively. In order to make the three point light sources image on the p point at the same time, the optical centers O 1, O2 and O3 of the three lenses should be located on these three straight lines respectively (as shown in figure 1). According to the geometric relationship, there are
. O 1O2=.O2O3=L？ uLh =( 12+ 142)h≈0.854h…③
That is, the position of optical center O 1 should be below S' 1 and S' has been praised and trampled. What's your comment on this answer? Comments: If your problem has not been solved, please describe your problem in detail and provide free professional consultation through Baidu Legal Pro. Other similar problems: after the appearance of 2022- 10-08 laser, it showed many characteristics different from ordinary light, including (). In the experiment of 2023-0 1-29, the laser emitted by the semiconductor laser belongs to () 2022- 10-05. Taking semiconductor laser as an example, the principle and conditions of laser generation are explained. After laser appeared in February, 2023- 16, it showed many characteristics different from ordinary light, including (). After 2022- 12- 16 laser appeared, it showed many characteristics different from ordinary light, including (). 2023-07-03 What is the central wavelength of semiconductor laser related to? The structure of 202 1- 12-06 laser includes three parts: the main characteristics of low light 20 16- 12-02 illustrates the principle and conditions of laser generation by taking a semiconductor laser as an example 15 More similar problems? & gt recommended for you: F.context('cmsRight', [{'URL':'/d01373f082025aaf511aa256e9edab64034f1a07? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '， ' contractId':'A24KA00562 '，}，{ ' URL ':/builder/bjh-activity/articlesTask？ taskId = 1598082 & aside = 0 & footer = true & from = 0 '，' src ':'/203 FB 80 e 7 bec 54 e 773 ea 0680 ab 389 b 504 fc 26 a2d？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}，{ ' URL ':/s？ word = % E6 % AC % A7 % E6 % B4 % B2 % E6 % 9D % AF & sa = searchpromo _ ozb _ zhidao _ tuijian '，' src ':'/3 BF 33 a 87 e 950352 AAF 5 df 4954 143 fbf2b 2 1 18 b6b？ x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto '，' contractId ':' '，}])； Is Huaqiang North's second-hand mobile phone reliable? Why is the cost of cancer treatment getting higher and higher? The price of electric cars has dropped many times. Is the quality guaranteed? What impact will the "network toilet" have? I recommend f.context ('recbrand', [{"img": "\/86D6277F9E2F07083523F69DFB 24B 899A901F20d? x-BCE-process = image % 2f resize % 2Cm _ lfit % 2Cw _ 450% 2Ch _ 600% 2c limit _ 1% 2f quality % 2Cq _ 85% 2f format % 2Cf _ auto "，" url":"/hm.js？ 6859 ce 5a af 00 FB 00387 e 6434 E4 FCC 925 "； var s = document . getelementsbytagname(" script ")[0]； s.parentNode.insertBefore(hm，s)； })(); window . TT = 172 1040222；