JPS58106509A - Lens controlling system - Google Patents

Abstract

PURPOSE:To execute an automatic focus control smoothly, speedily and stably, by forming a signal related to movement of a lens, and controlling the driving force or speed of the lens in accordance with this signal. CONSTITUTION:A pulsative signal corresponding to driving of a lens is applied to a monitor terminal 208, is converted to a voltage signal by a resistance 209, is processed as a varied pulse by an amplifier 213, and an expected pulse per a constant defocusing extent, which has been generated by said signal and a signal of a line 207, that is, a signal of a defocusing extent/(1 pulse interval) is applied to a phase comparator 233, so that there is no difference between the expected pulse and the actual pulse related to the lens. Also, the unifying control of the focus surface moving extent is executed by comparing the pulse related to the lens and an output pulse of an oscillator 236, by a comparator 237, and it is prevented that the lens pulse becomes quick abnormally and a malfunction occurs.

Description

[Detailed description of the invention]

The present invention relates to a lens control method, for example, a lens control method suitable for driving a lens in automatic focusing and the like. For example, in automatic focus adjustment, the actual adjustment drive of the lens is determined by its output operation, and therefore, it has not always been possible to obtain smooth results in this way than in the past. The present invention was made in view of the above circumstances, and provides smooth, speedy, and flexible lenses and drive mechanisms.
Moreover, steady drive control can be performed. In particular, it is an object of the present invention to provide a lens control method suitable for automatic focus adjustment, etc., and for this purpose, the lens control method of the present invention forms a signal related to the movement of the lens when the lens moves,
It is characterized in that the driving force or speed of the lens is controlled based on the signal. According to a preferred embodiment of the present invention described below, the movement Mt of the lens at the focus position is controlled to be substantially constant, and the lens-related signal is controlled to be a pulse-like signal. It has been proposed that the frequency of the pulse-like signal be formed as -1, and that at this time, a means be provided to prevent the frequency of the pulse-like signal from becoming excessively high. This type of lens control system is also extremely useful.Other objects and features of the present invention will become clear from the following description with reference to the accompanying drawings. 2. In Fig. 1, in order to properly image the proboscis mound on the intended imaging plane 2 with a 1μ photographic lens, the same lens 1 is aligned with the original axis as indicated by the arrow 3. It is possible to take 6G along 0, but due to the detection of the focus, J2
and its i4J friend's rank 1, i.e. 4
．． , Convert the stock at the position shown in 5.6 into a drowsiness signal using a senna, and process the comparison process. And 7 stop. Next, in FIG. 2, positions 4, 5 and 6 mentioned above. The sensor unit 11 transforms one of the houses into an electric one and feeds it to the focusing unit 12, which then configures the defocus section and performs focusing and defocusing, making it difficult to operate. The display unit 13 is used to calculate the drive amount for faster and faster focusing, and the center unit 14 is used to achieve 74 stops and 15;
-1'. According to Figure 3 for a long time +++-needle fish 7+) 1 knowledge unit 1
2? To explain lJ, in the same figure, in order to stabilize the signal due to 21, 22 and
-1 This ψJ low signal generates a signal M that becomes low depending on the brightness of the ranging area. 5, which becomes high. This signal causes constant current WL circuit 31
, 32°33 is controlled by 1 and bright! ♀ Apply current to point 34°35.36/? ! The current level of clarity of the tearing waves makes it seem like there is no brightness. In this stock, the planned focal plane and the front and rear Mikiaki Tomo Shinryoku are ``j + width device 37, 38. 39 in the J stomach and line 40. 41. Planned focal point...The ink that obtains the sharpness level 1 on the 1st plane is produced.Of these 3 signals, 2 signals on lines 40 and 42 are given to the differential 1st width detector 43 to calculate the images before and after the planned image forming plane. At the same time, the nucleon constant imaging plane t4+ is determined by the addition amplifier 44.
Calculate the sum of the sharpness of the image after I, give these two values to the divider 45, and divide the difference by the sum. 4) Standardize the sharpness of the subject's own mound and calculate the sharpness before and after the planned imaging IF11. Chapter from position (8)
A number 1a, that is, a defocus amount proportional to the imaging position from the position is output to the terminal 46. At the same time, the comparator 47 determines that the polarity is high when the front side j is clearer, and when the opposite side is defocused (
In other words, when the grip is clearer, it is output as the defocus direction with - and t rows. However, here, the defocus direction of the terminal 46 mentioned above is either the its point or the internal division point of the front sensors 21 and 23. The defocus can only be determined correctly if there is -, and the defocus cannot be determined correctly if the 1-axis is greatly blurred at the 4, 5, and 60 positions.For this reason, the diodes 49 and 50 and the resistor 51 Find the large 1111 of the front cover and set it to 2.
Comparing with No. 1d of Inn 41, that is, the sharpness on the planned focal plane using the ratio 2/Bori 53, when the sharpness on the planned focal plane is better than the sharpness on the front and rear planes. That is, when the image plane is at the internal division point of the front and rear sensors 21 and 23, if the prefectural control is used, if the defocus amount of the bracket 46 is a fixed value, a high signal will be output to the 54 bracket. My father is in a medical condition where the membrane ends and the valley sensor 21, 22, 23
Since there may be cases where the output of
This false signal is converted to p (by comparing with the M single IN by the resistor 59°60 using the specific collector 61, the light component is Iμf bright! If there is a difference, output the same))) and the AND gate 62 converts the I if
,! r3＼ mouth 1゛ bowl outside the obstruction, direction only 1m iQ
If you want to do that, make the lit force rノ) ii, and in this way, only the direction will be set to the 1st point of the yijunni, and the mokko 63 will be ノ・i. Father, in case the signal is too blurred, use r.
B The output wax of the soft tube 61 is inverted by the inverter 64.
After eating a meal, I output a high signal to terminal 65 and the above-mentioned Iro signal is OFF!
Let'7i1J be 1%, which is 73. Foreign capital is welcome. Also, in the clear case, the specific capacity slows down to one line, so when the pulse in the direction of '7. 611]
As the timing city number of the distance result, nucleation νJ is set once.
) 0 to close, lens seat 1, i.e. 1. During the 7-ta drive, the erroneous range +++ width is set, [because there are a few towers, a high signal is given to the terminal 69 during the drive from the 6-stroke unit of the drive circuit of the Ling λ small. j1'Turtle If 'tl]lJ
Clear 411 Snake Dig 1% and make it a stock that prevents 6 kings of Strobe Pulse with 1 mistake. Also, as sensors 21 to 23, COD temple animal 11

[If you use a cedar sensor, you can use the row of this tribe number to control the length of τ. As these signals Q11 and I11, the CCD
The pulse at the terminal 68 is the pulse corresponding to the timing of the determination of the position of the ground range system using the sensor on the 1st floor of the temple; In addition, if the side distance is completely different, if the distance is 1, even in the IJ deviation method, the defocus of -11 is determined, and the loss of the thickness is the same.] 4 calculations The defocus is large, such as a large brush with a bottom of 9 and a 1", etc.
No.) is also a medium for calculating the direction, f limb, and the same 1+ wound J
I apologize for f4f. Next, 7g 4 As shown in Figure 4, i + +, d i + lIJ +
# To clarify the entire row of display units 13, the stopper 81 is shown in the same figure.
1, the calculation timing pulse (output from terminal 68) from the wisdom unit 12 is sent to the terminal 101, and the direction of the object with an uncircumcised tail is either undefined or hidden (-output from papier-mâché 62) or 41 child 102.
In addition, the direction only supplement is determined by No. 1.4 (fan 63
output) is given to Shigeko 103, and paternal 1μ' No. 16 (Phiko 48 output) is given to terminal 104. Father, 31 Shoji 1st song range is sure to be connected to terminal 105 (i4a child 54 output), and the defocus amount of that 1 call (terminal 46 output) is served to terminal 106. Of these, defocus 71'fQ is absolute ++ILf
Absolutely on AT Road 107! Turned into 111, changed history, Sapphire 1
At 08, the digital value changes to 1;a.・Since it is smaller than 3, it is determined by 109 and 110, but it is leveled to the desired level and the output is 1t at 111, and the output is sent to AND gate 112 along with the pheasant setting of defocus 1111 from terminal 105. Due to the condolence given by A1, it will be shown to the ship 113 at the time of threat or when the AF convergence is the same circle as the high boar number.
This person's F convergence area may be widened due to lens shooting and rainbow, so one child is this resistor 109,
Reduce the level of unresolved problems caused by 110 - faster than ever
II also Song and AF Koryo and table 9, nothing, I,! :There are not a thousand black skewers to be done at the Tokyo meeting.In the actual example, this is the focus range.
0 or more (i) that clears R bacteria 13108
The acquisition AF is performed in synchronization with the strobe signal given to the terminal 101 mentioned above when the L exclusive i+ll busy platform pass is confirmed, so the signal during non-drive is confirmed by the 60 series voltage controlled oscillator 69 in Fig. 43. When a pulse occurs, the signal is updated or a pulse is generated. If you are not using the above-mentioned AF Shutojudan, immediately ``r), and if you want to change the lens, use the above-mentioned fin 1.
The signal of 13 is inverted by an inverter 17 and output to terminals 119 and 120 through the line-7 lip flop λ described in the signal tone 1j1 which becomes high when the suspension motion is desired. This high signal drives the lens by 1, so the necessary force ≦,
At the time of lens pigeon movement, they receive the drive end signal -54f terminal 121 high number or lens limit signal terminal 122.
The high number 1 is inputted into the OR gate 123 and served. At the end of the ringing or when the next data is generated, the next step is to be carried out! has been completed. Since the data at a distance of tu and lJ from the distance of the multiple series is held in the latch 116 at the time of 98 data, it is necessary to operate the lens system based on this data. t3IU, defocused pupil and conus anastomosis are line 12
4 becomes high, the output of the OR gate 125 also becomes high, and the output of the melon gate 126 is incremented. A), therefore, Hae flip-flop 12
8 is ω gate 1 because the clear line 129 is also low.
30 is closed) terminal 10 through OR gate 131.
The O D flip-flop 133 applies the specified direction (sign) information and water to the terminal 132 and instructs the b translation to drive the lens in this direction.
1i, and is clocked by the signal on line 115 mentioned above. Now, if the instruction is the same as the previous 1u1, regardless of its direction, Shirou is on the exclusive O [Gate Gate 4 (134 (Kousuke Steel 4.fVI)] 3)
5, the division circuit 136 that outputs 1/2 of the input is pierced with all human power, and the AND gate 137
is open due to the high signal on line 124 (at this time, the AND gate is open only in one direction of terminal 103).
Since "n4A constant" is low, it is closed by the row of line 139, and the gate 140 is closed by the row of line 129 mentioned above) OR gate 141 f : ui
At that time, the request defocus 16: is instructed to the terminal 142. Note that the phase boundary circuit 136 and Shibu O output 1/2 of human power.
R gate. Therefore, in order to converge even if the defocus is instructed incorrectly or incorrectly, if the direction is different from the previous one, the current defocus will be completed and converged (reduced to 1/2) to the L city. However, this IQ circuit can be used to quickly converge without preventing most problems, so it is a relatively emotional circuit. That is, i:ii +! ,! In the case of an error in the opposite direction to I, the output of the exclusive OR gate 134 is set to high regardless of its direction.
! 21% 136 and 143ft, Ia were made, and the current 81714 water F & was made to be destroyed to prevent the in-focus point 171 ft from being imitated. For example, if only the direction is confirmed and you want to check the accuracy for defocus instruction 5, terminal 105 is low, terminal 103 is high, terminal 10 is
2 becomes LOW, and the si line 124 becomes the LOW line 1.
Since line 39 is high and lines 127 and 129 are low, the drive is stabilized by a certain amount in the determined direction. Here, the direction is OR gate 125 due to the high of line 139.
The configuration is such that the output of ``is set high'' and the determination method is output to the direction indicating terminal 132 by excluding the gate 126 and ``/3/'' while the AND gate 130 is closed. In addition, the amount of water required for small cuts is small and there are few φs that exceed the defocus female bow range, and there is no way to select too much of the 4-foot range only in the father direction, so 1 wra, and 2 wra if you fall down, set the corresponding code as a constant. Setup 144 is given as a constant (which may be changed depending on the lens size), and the Mil predicate division circuit 143 is used to prevent older vibrations.If the direction is the same as the previous time, it is set just before that one.
L! If the anisotropic is the same as 1, the value of the subordinate is passed through the M resort 138, the gates 137 and 140 remain closed, and the OR gate 141 is further followed to request the terminal 142. Close it and make a mountain blade. When the direction is also non-+1 (f+ constant), the fourth speed satin 105 becomes low, the terminal 11 bow becomes low, and the terminal 102 becomes high, so that line 124 becomes low, line 139 becomes low, and line 127 becomes high. If this direction is also uncertain, -L4
There is a Q'ft electric property that occurs due to the original formation of the lens (such as a ten-shake), but in the case of essentially indeterminate and tilt constant, there is a large deviation due to q>, which searches over the entire area of the lens. When you aim to the focused point, start the search operation by pointing to the focused point. The momentary theory: r1. In order to prevent the incident of leaving the focused point and losing the focused point, I am developing the following safety conversion circuit. 3.1. In the unused ε foot, the flip-flop 1/8 is reset completely due to the high of line 127, and the quality is lost, but the line 129 is not high yc, and the MD gate is 1.26.
t, 130 is closed, so 7II11 child 132f
It becomes i-row, and M0 gates 137, 438, 1
Since 40 is also closed, turn the OR gate 141 and
42, output Mou I request-J forwarding- and set r4 of lens.
A I don't do Jl. However, rapid vomiting more than once/,)unh
When a constant...-), the line 129 goes high due to the setting of the &D flip-flop 128, and the - of the MΦ gate 140 causes rLg, and the search lens from the active 145 = A! - A search step for searching the entire area of the lens defined by the aneurysm pivot, which searches the entire area as quickly as possible and does not dislodge the base 7, K, moth, i.e., the direction Distribute ÷1j snake wall9. Looking at the insignificant wealth at O1t gate 140 - 1 @ child 142 to 1 compromise ^
(It closes and outputs the sound of hard water. The direction is around the limit of the lens for fishing in the fishing area!1.1
1) By the T-flip-flop 146 which is reversed by the end 16 which is 1 dijed, the indicated direction is the static gate 130 and the OR Press the gate 131 and return to the pivot direction arm 132. With this fritsuno 70 knob, when the system is maintained, Runs searches with -1 and emotional abuse until it reaches the limit, and at the limit, it is reversed and searched again. Next, referring to FIG. 5, an example of one unit 14 of the above-mentioned 1-mm actuation control unit 14 will be explained. Only terminal 142 output) iA energized to 4 children 202
Q direction 10] Signal (terminal 1.12 output) VC 1]
Show? The stripes that are attached to Kumiko 203 to Shiru Kyoumankai! The same lens km that the input signal (terminal 119 output) is high
Riding with a moving Friend Unit. "Lens 1 to 1" has a motor as described in 1, and the :L:vL protrusion L of the lens,
, i'? The sand on the lens is what stops the drive from entering.
j, l As a Q monitor, add +h to the lens Hzut followed by 1' of pulse fall; @ 'Wait for the means to generate y, j,
Also, when the pulse 1d only 5 is in focus, the γ phase is direct G.
According to 10, +V has an OJ ability that changes due to zooming etc., so as a code for that, (bin) 'transition 4
m'la) (1 pulse interval) resistance or a]
'f is held by criticism. A signal of (focus S = v HIE ) / (1 pulse interval) from the lens, which will be described later, is given to the V-face 204, and a constant current of 1! :4I'y62
05: l'+j is related before movement; it emerges as a specific pressure. This voltage is transferred to line 207 (current bit) by converting it to line 206 and is converted as a code as large as iy (for example, as a ratio of !V+i). Change 1 of the 206 transformation device, the first grade must be linear, and the rc < s lens must be the greatest number! II) ik
It is used as j for the transfer I of Ryoun. Well, 1. I'=5 In the unit 14 shown in FIG. The voltage signal is changed to the voltage signal by the resistor 209, and the capacitor 21 is used to surprise the one-sided rule of froji.
0 and the resistor 211, the pulse signal changes ((falling to the iND level) to the iND level) at the moment 212 at all times.
+'+ (CLζζ short leg +i(j), goes low. No. 6 is ijjed and processed as a change pulse by the interception device 213. The diode 214 changes the 9 point 212 to 441 due to change in the opposite direction. This is to prevent W6' from being under pressure when the pulse is generated. Also, the time constant of the resistor 211 and capacitor 210 is used to prevent chattering during pulse generation. ' then the same t1-'-1
The road part is terminal 2 (Jl's water defocused firefly only, add 1 town to see if the lens is 21 times stronger (wa 1.) Valley, 1 pulse less between I-'I and + & Tanora. is line 20
7 is 6f and r), so the second edict (t (■)) -7 lipfrog 215 is ffr, !:fi
Then, Uni, 11-g'w 216, this Qll and 伎iU, tj de per 1 νj of 1 pulse song.
．． i+7- and the arrow's ``Rus'' is on line 217.l-
Output te's 4 multiplier (1's f4'r, and output +'6.1 grip bag ti y horn spot (signal of point 201) and large and small ratio 2
Compared with 18, when the pulse of the arrow becomes human for the Yasuku transfer 1 line, when Moe-Koshiki becomes human, heike outputs to line 219,
At static gate 220, moving to one s fJll, terminal 21
) When 3 is high, l', l-i;
^'s carving is stopped, the Vc-containing step is stopped, and the next side game;
Let 1 be σ. The above jJ+I M-+i, D-7
It is reset when the lipfrog 215 is at terminal 2 (lower IL of 130 item jsuke 111, pa 1) and non-Kinu U.
j'L, z 7J'tsu, r:r Harus mother's dagger 213
Noyamaba t Koyori lJ” Noritsubu flop 215 bij
It is a valley or a break] and the same pulse is the blessing of the transferred blood in the soil. On this day off, Ju is exclusive to the combined pulse t6-)v'? :, First of all, I asked Kaibobarusu in Raikanyo ↓ Is the composition compared to Nezuu's Kaede-'JJ-! υ has not yet appeared, and during the pulse, Ichigawa Yamiwaku will be used as a bridge for the SotX movement.]
In order to promote the performance of Kobun, I came to ``I'' to perform a very popular performance in the IE world. Yu d! [by] again! to human-powered OR gate 222 field line 2
23 ii becomes high, and the splitter 224 or R8-7 lip flow 2. Therefore, the Q, output, and t of the flip-flop 225 are set! 1j Chi, End Bakata 4
The 11i child 226 goes low. -When force is required, Q, Tsuguko 20
By 3 becoming high, 14! J luck p, output from E4 gain 213 to row: kojiization (i.e. lens 'J
/11p1 (falling to the C[F] level) is ';, ;i1. As long as 9 is 1, the output of the input OR gate 222 becomes rLo, and the +fjM signal 224 is cleared and begins to transmit the pulse from the i oscillator 227. Only those who accept the agreement will have a few degrees.], I will set the input 228 to full high and output the signal 9- output. , Even after a certain period of time and 1 f, the current output does not move beyond the current level.
26, the lens liquid outputs a high signal to indicate (5*). During this constant time i, -jj, a pulse is emitted, and the output of the device 2130 changes to low. If the output of the gate 222 is high V (the output of the gate 222 is cleared and carried, the high level of the terminal 226 will not occur. [Change A] To know the lens limit by nothing, the old line for the monitor is one line and there is no light, but the distance between the pulses generated by the lens bin) is 5Illq. Even if it has changed, due to the death coat of the terminal 204 mentioned in @, the frequency division ratio of 224 is changing, so always keep in mind the defocus of the pin znJm-1 and the lens limit...? Even if the pulse interval changes depending on the lens, the appropriate judgment will be +jJ ffi:. 123 How many pixels are there in the entire frame? Also, in the search mode, the inverted iT-flip-flop 146 is used to search the entire area.Next, to explain the lens driving force control section 101, the circuit section This is a compensation circuit that compensates for the fact that the motor driving force, speed, etc. differ depending on the lens, or that the pulse interval related to the lens mentioned above becomes irregular. line 207
100, that is, a signal of (defocus)/(1 pulse interval) is used to obtain a constant defocus at the terminal 232 by the frequency divider 231. pulse,
Generates a pulse corresponding to the period and performs a phase-locked
What's the loop, Tabi 4w *? , + (with a low-pass filter at the output) 233 (with a low-pass filter at the output) is added to the output of the 213 A device 213A, along with the other lens-related pulses, if the expected pulses are slower than the actual lens-related pulses. , in the case of high output, and in the opposite case, low output W = produced. Increase or decrease the power of the motor by S￥ﾾ'+'ii￥235 through 4 resistors 234. By feeding back the number of pulses that can be obtained, the response speed is increased depending on the lens, and this prevents the limit/next circuit described above from malfunctioning and becoming difficult to use. The interval between the lens-related pulses is so short that it becomes difficult to distinguish it from chattering due to the short interval between the lens-related pulses.
Original device for PLT, phase comparison filter with phase-locked loop (with low bass filter on output) 237
Compare the lens-related pulse with the output pulse of the oscillator 236, and if the lens pulse is different, the output will turn on the transistor 239 through the resistor 238 by turning its power high. According to the above-mentioned phase ratio yield 233, the speed (ratio control (focus plane movement a)
The fixed system (!11) prevents abnormally fast lens pulses from malfunctioning. By turning on the transistor 2390 and reducing the human power of the width 5235,
The motor power is limited to keep the speed at a low speed, and the slanted lens puts weight on the drive system. Next, in order to congratulate the motor and drive circuit Vζ, when the circuit is not 1.241, the output from the gate 241 is made low by the terminal 2030 low, and the inverter transistor A is turned off. Turn on OR gate 4. lr'ij < Since the output of the AND gate 248 is low, the output of the inverter 249 becomes high, and through the resistor 250, 1) the np-transistor 251f is turned off. The inverting input OR gate 252 has an output high due to its inverting input going low, turning on the npn-) transistor 254 through the resistor 253. This turns on the transistors 247 and 254 and prevents the diodes 255 to 258 from tilting due to the back electromotive force of the motor.
9 and 260 are short! The t1 brake (magnetic brake) can be applied. The lens does not reach the limit of +jiJM @Seha flip-flop 225 Qff
Since l force is low, NAN'lJ gates 260, 261
The f low output is high. For example, if the drive-wire direction terminal 202 is high, set the terminal 203 to high and drive +z
When the output of the Φ gate 248 goes high, the output of the Φ gate 248 goes high.
The output of R gate 252 goes high and transistor 254
is turned on, and the transistor 251 is turned on due to the (1) low power of the inverter 249. Also APD gate 241
Since the m power of is low, the output of OR gate 245 is low, which means transistor 247 is turned off,
Since the output of the inverter 242 is high, the transistor 24
4 is also off. For this reason j'i9 II] (S'i
The output (positive) of f 235 is given to terminal 259, and
The terminal 260 is grounded by the transistor 254, and the motor is driven and powered by the transistor 254. If the limit is reached, the output of the NAND gate 262 becomes low and the drive is stopped. For reverse direction (1), terminal 202 is low and terminal 2 is
When 03 is made high, the output of the gate 241 of M becomes high, and the m power of the OR gate 245 becomes high, which turns on the transistor 247, and the tjj power of the inverter 242 becomes low. Therefore, transistor 244 is also turned on, and due to the low output of AND gate 248, the output of OR gate 212 is also low, so transistor 254 is turned off, and since the output of inverter 249 is high, transistor 254 is turned on. 251 is turned off. Therefore, the output (positive) of the amplifier 235 is applied to the terminal 260, and the terminal 259 is grounded by turning on the transistor 2470, thereby driving the motor in the opposite direction. And if you hit the limit, NAND gate 261
When the output becomes low, driving is stopped. In addition, when the 13 movement is stopped due to the low drive terminal 203, A
Putting the brakes on everyone with r1 luck 0 The above according to Figure 6: 3. The A moving bed unit 15 will be explained. The configuration shown in the figure corresponds to, for example, a variable lens for a negative-eye reflex camera. That is, the column in the same figure has a 4 or larger lens 301 at a certain speed j 302 . Terminals 305, 306 to motor 304 through 303
This is an example of moving the candy to the bottom of the candy J, not only by moving the rim of the lens, but also by moving the ml ball and the candy.
-+ focus can be realized by Zhang 48. Here, the main pulse is output to the motor element 309 by the brush 307 that moves slowly and is grounded by the lens 301 (transfers to the tooth electrode pattern 308! According to the force, the above-mentioned lens and lens are connected).
41i +Jy to l"fib, and also, world resistance 3
10 creates a small unit that can store the code of JILFI child 311 total 311 (Default ST etc.)/(1 pulse interval). With this code, I++1 is changed according to zooming, and the part that changes the 1st focus becomes OJ to compensate for the focus and movement by transmitting the change in front of the lens and defocus amount due to zooming. ji ('. 312 and 313 are the kD output of the lens, the top member for fringing, and the momentum inhibition when viewed with this member + hi'': t Ail description in Figure 5, %ll entry side control It is detected by the limit adjustment circuit in the unit 14, and the control at the limit by one prefecture that stops the use of sea bream becomes the same without using a separate switch. As described above, according to the lens control method of the present invention, it is possible to control various lenses and drive mechanisms smoothly and quickly, regardless of the type of lens or the type of drive mechanism.
This makes it possible to perform steady drive control, and is extremely useful, for example, in automatic focus adjustment, as it allows very quick and stable lens adjustment with fewer errors. As an example of means for generating lens-related signals (pulses), in the embodiment (Fig. 6), a mechanical contact method using a brush (lo 07) and a comb-shaped electrode (608) is shown, but of course In addition to these, non-contact forming devices such as photo interrupters and electromagnetic start-ups are also fully applicable.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram for explaining an example of a focus detection method of an automatic focus adjustment device to which the method of the present invention can be applied, and FIG. 2 is a schematic diagram for explaining each of the above automatic focus adjustment devices to which the method of the present invention is applied. A system block diagram showing the general configuration of each functional system; FIG. 3 is a block circuit diagram showing an example of the focus detection unit in FIG. 2; FIG. 4 is an example of the drive instruction unit in FIG. 2. FIG. 5 is a block circuit diagram showing an example of the drive control unit in FIG. 2, and FIG. 6 is a schematic diagram showing an example of the drive system unit in FIG. 2.

Claims (1)

Claims: (1) A lens control method characterized in that when moving a lens, a signal related to the movement of the lens is generated, and the driving force or speed of the lens is controlled based on the signal. (2) The lens control method according to claim (1), wherein the lens control method is configured to control the amount of movement of the lens at the focus position to be substantially constant. (6) The scope of the present invention is such that the lens-related signal is formed as a pulse-like signal, and at this time, means is provided to prevent the frequency of the pulse-like signal from becoming excessively high. The lens control method described in item (1) or item (2).