TWI303417B - Method and circuit for modulating optical detection - Google Patents

Description

1303417 Emperor 93mm 发明5, invention description (1) [Technical region to which the invention pertains] The present invention relates to an optical reading method and circuit, and more particularly to an optical having a monitoring component path 0 for adjusting an optical reading wheel Reading method and electricity [Prior Art] Optical, taking the technology as shown in Fig. 6, the lanthanide system is equipped with a laser diode group 5 2 / and an n-pole element 6 as main components to generate light and receive light 21 \ J The medium-spreading-polar body combination 2 includes a laser as a light source. The second light=4=the direct light-emitting intensity of the laser diode element 3 is received by the optical disc 5 a signal of the light of the anti-body element 3, the laser diode Γ/ΛH is reflected and received by the optical disc 5 6 opposite to the optical reading device 1p, and is generated The output current of the photodiode element 6 is 1{). The converter 7 is converted to the signal voltage νρ by the signal voltage νρ. The fly is taken out, and the letter of the optical disc 5 is generated. Here, one end of the laser diode element 3 is connected to the DC power source, and the other end is connected to the ground: g, and the kidney is inserted into the end of the sub-la The ground terminal lc of the semi-connected ground G of the size of the # # 4 元件 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 Diode element 3: The intensity, and the reflection from the disc 5: = ray l3〇34i7 曰x ----- case number 93133119 sheng 5: invention ^- also needle; I: Pair::: The polar element 3 requires a suitable luminous intensity, whereas the one-pole element 6 requires an appropriate output amplitude. The 'radio element 3 and the photodiode element 6 are formed in the state, and there is: to add it: there is a suitable action 3 because of the application of direct current; or, for example, the laser Diode element ^ ^ t ^ ^ A , , , 0 ; 45 /; V? 1 ^ ^ ^ ^ 5 In addition, the photodiode element f = the block difference is managed, the conversion efficiency is different, because =: 6 is the same as the second, and it is managed by each photoelectric conversion. , 9 information within the error range managed by the specifications of the 5 ΐ ΐ :::;;:: 3 illuminating the output current of the laser light on the optical disc element 6 ΙΡ limited to the photodiode diode of the light If the body element 3 and the photodiode are enclosed, if the aspect of the laser is reduced, even if the synthesis error of the two of the 7" is 6 in total, the polar component 3 and the photoelectric Diode element 6, the flow IP is limited to the specified range ^ The output of the photodiode element 6 is lower than the output end 2I ί, and the synthesis error must be fixed to the 叛 栌 4 叛The /ord control element 4 of the resistor 8p is set up, whereby the signal current of the amplitude of the optical cut-off device 1 is cut: 1: = It is possible to have an appropriate output (see Patent Document 1), and the appropriate S/N. ^ =Sun and moon about the use of semi-fixed impedance 2 square 4 ° especially cough device 1P adjustment page 8 fifth, invention description (3) learning reading device 1P current electric conversion amplifier in addition to connected to the signal The electric (4) electric (4) turns out that the input terminal connected to the wheel terminal connection of the laser diode element 3 is also divided and the output of the monitoring element 4 is connected to a, = has the reference of the wheel reference voltage Vref The electric relay _adjusts and the electric knife another = input = sub 10a, and monitors the electric input terminal m, and: == the connection point of the component 4 is connected via the opposite side -^ //Λ" ^ φ , UX&gt ; 1 weight to become the reference voltage used to control the output level of the amplified 12. The DC element V 〇 via the adjustment circuit Up body is applied to the fielding laser body element 3, and the laser diode element 3 is prepared, and the dynamic current is flowed, and the photocurrent is due to Through the semi-fixed; == electric the semi-solid === the impedance value of the 8P is R; for Im ' and + fixed impedance

Vi = I m (1) = solid: the connection point between the resistor 8P and the monitoring element 4 is connected to the connection adjustment circuit 1 〇p via the output terminal lb; = ί = terminal, thus adjusting the second Over and under 'to increase or decrease the base voltage of the transistor, and increase or decrease is applied to 1303417. Correction 曰 Case No. 931^11 Q 5. Invention Description (4) § The DC voltage of the diode component 4 The size of the cockroach. That is, the _ whole circuit 10p is increased by v 在 at Vi < Vref to enhance the radiance 9 and is reduced by v when Vi > Vref. Weakness; , :: The luminous intensity of 70 pieces of body 3, in general, it will be controlled by Vi = Vref. The light of the diode element 3 can also be irradiated onto the optical disc 5. The light reflected from the first disc 5 is connected to the photodiode 6: body 6: the size of the output core is changed by the current electric (four) The amplifier 々] = (b) f is connected to the output terminal ib by the voltage Vp to measure the optical signal reflected by the optical disk 5, in order to exhibit the appropriate S/N of the optical reading device 1 ίΓ::1 The output current of the photodiode 6 is swayed by the illuminating intensity ^ ^ J It is necessary to adjust the laser diode element 3 and it does not relate to the luminous intensity of the laser diode element 3, Vi丄2, the photocurrent flowing through the monitoring element 4 in the basin is /, the impedance value of 8P is R; the semi-fixed resistor is Im'

Im

Vref /R (2) due to the luminous intensity of the element 8 flowing through the photocurrent Im of the monitoring element 4; salty, so the impedance value between the U-polar diode fixed terminal and the movable terminal; The size of the photodiode 6 can be used to widen the photocurrent 1_ size. j power out kip adjusted to the appropriate page 10 1303417 amendment

V. INSTRUCTIONS (5) [Summary of the Invention] Generally, the five-brother, semi-fixed-impedance device is compared with a fixed-impedance device. In order to properly adjust the photodiode device, it is necessary to use the impedance value. The semi-solid 'Electricity' with extremely high precision is set, so that the cost reduction of optical reading cannot be achieved.

= In addition, the semi-fixed resistor has a long-term stability in the movable contact I', which causes a bad contact due to acidification over time. ^ The set impedance value changes, #合,止士水The value of the component is reduced, and the current of the first diode element is unstable. &lt; Loss = wood has a conventional fixed point of use, using a cheap fixed resistor to take = fixed impedance - 'improving the precision of the photodiode element while providing a pole = optical reading The method is the main purpose. J 疋 的 的 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 J 本 本 J a photodiode element that reflects light, and an output end of the monitoring element and limits a detecting electrical reactor of the monitoring element, the optical reading adjustment method is characterized by: crying the impedance as a fixed resistor And a synthetic resistor formed by the connection of the fixed resistor and the second resistor and the resistor, and the adjustment of the reference fixed resistor group having the switching switch and/or the known value selected by the switching switch The resistor is connected to the terminal for connecting and continuing the additional resistor, and is switched to and connected to the reference fixed impedance crying of the fixed resistor to make the laser: the polar component emits light, and the photoelectric element is selected The output current of the diode element 2 converges within a predetermined range of the reference fixed impedance 1034417. 曰Correction 93333119 - Year 5, invention description (6) Optional added after the solid of the reference resistor with the resistance value of the contact resistance value approximate to the resistance value with respect to the resistor. The cake is replaced by the optical reading described in item 2 of the scope, and the resistance value of the resistor is replaced by the adjustment..., ', &quot; the resistance is in the state and continues to be in the fixed impedance boundary 2 ^ Convergence to the output current of the photodiode element is determined to be approximately the same as the impedance of the variable resistor. The resistance;:-two: the optical reading adjustment method described in the three items of the brothers, is crying: after = fixed resistor and serially connected to the fixed impedance of the fixed impedance two, and will have * fixed impedance The adjustment resistor of the group is connected to the series connector, and after the switching output of the quasi-reference firmware connected to the fixed resistor converges within a predetermined range, 'will be fixed with the selected reference Impedance crying ΐ, :: ί Ϊ: The additional impedance of the impedance value is connected to the impedance of the synthetic resistor. The optical reading adjustment method described in item 4 of the patent range is: 2; f resistor, and the variable resistor is connected in series for connection; == ; the device is followed by a terminal, Within the impedance value of the additional resistor: This: The impedance of the variable resistor is approximately the same. The method of optical reading adjustment described in the case of the case f is ----------------- Page 12 1303417

t No. 93 彳 130 1303417 _Revision 曰 V. Description of invention (8) The output of the receiving element of the light emitted by the one-pole element is strong. &lt; Debate on the strength of the first 兀 ” ” ” 学 学 学 学 学 学 学 学 学 学 学 学 学 学 学 学 学 学 学 学 学 学 学 学 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 The optical ancient sold in the second item of the February range takes the lightning path, Sun Zhao includes the reflected light photoelectric: the extreme monitoring component, (4) the end of the optical disc and limits the detection output of the monitoring component ^ the output range of the monitoring component 1st to 1st, a two-machine $-impedance device, connected in parallel or in series according to the patent application; the impedance value, and the rear-end terminal of the device, and the additional impedance of the rear-impedance device The first 1 '1 〇 ' ' 2 f 2 弟 1 1 1 1 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 使用 , , , , , , , , , The output amplifier of the base and one end is connected to the output; the non-inverting input end of the technology from the reference power supply is connected to the non-inverting input terminal of the other end, and the other end is connected with a small adjustment resistor. Shen Hao patent scope 1 ^ Hui in the application for patent The optical reading adjustment device of the item 12 is a device having a known Fuxi I pre-adjustment adjustment device, wherein the connection resistance is selected in the group of resistance resistors, and the reference is selected The optical read adjustment device constructed by the switch of the reference fixed resistor is 俜 _ 眶 面 E E police p: ^ riv.v_: -----------', brother 14 pages 1303417

No. 1 93133119_ Month H V. Inventive Note (9) — The optical reading adjustment device of claim 12 is a variable impedance device. μ a week of complete resistance 2 The optical reading adjustment method proposed by the invention is a polar peptide element, a monitoring element for detecting the amount of luminescence, a photodiode element for detecting =, and a scorpion connected to the monitoring element. The resistor for detecting the current of the monitoring component, after the fixed resistor is replaced by the reference value of the known value of the second selection: switching and coupling continues with the fixed impedance = simultaneously making the laser The diode element emits light, and the output current of the polar body element of the 疋 impedance converges to a predetermined range; the impedance of the electric two: the impedance value of the quasi-fixed resistor is approximately the accuracy of the output current of the electric diode component . In the evening, the resistor is also made up of a fixed impedance crying and an A-resistor connected in series, έ 4 疋卩 疋卩 anti-π and the fixed resistance and will have a composite with the fixed impedance = anti-11 The impedance, the switch, and the fixed impedance with the fixed impedance of the second-resistance value and the value of the f-value of the two-string adjustment of the cut-off group are considered to be connected to the light. The reference fixed in the fixed range of the additional resistor is fixed::: 70 pieces of output current can converge to obtain the same effect. m resistance values are approximately the same impedance value, page 15

Case No. 931331 IQ 1303417 V. Description of Invention (10) In addition, the variable resistance is used instead of the standard fixed impedance, and the impedance of the additional resistor can be set to converge with the output current of the photodiode element. The impedance values of the variable resistors within a predetermined range are approximately the same. [Embodiment] Hereinafter, the preferred embodiment of the present invention will be described with reference to the drawings. (Best Embodiment 1) ' _ ;! ^ ^ ^ ^ ^ ^ The laser diode element 31 = the source laser diode element 3 and the monitoring element 4 for monitoring the relative arrangement strength of the reading device 1 a photodiode element 6 having a signal with an optical photodiode element; a current converted from the voltage conversion amplifier 7 · a rain-out packet flow 11 &quot; to a signal voltage VP is small to set the light-ray, and support The large reactor 8 for monitoring the photocurrent I m of the component 4 further has the element output (4) fixed resistor 8a; the resistor 8 is pre-programmed into the composite resistor 8 for continuation and coupling, and the adjustment circuit described later is passed through After the adjustment, the first and second connecting ends = the fixed resistor 8b of the fixed resistor 8a, that is, the fixed resistor = 8, 8n, the one end of the combined resistor 8 and the monitoring end of the output side When the first connection terminal 8m is provided on the fixed impedance portion 1 m of the monitoring element end, and the other device 1 as the composite resistor 8 is driven, the other end of the combination and the second connection terminal 8n are Optical reading, and continued with the diagram &quot;& DC voltage on the laser diode The ground terminal of the drive circuit of the body element 3 is connected. Page 16 1303417 曰 PM 931^11fl V. Description of the invention (11) Ground terminal 1 c. m;;rria applied straight _ to the laser diode component 3 inch ^ the field shoots a polar body component 3 illuminates, 兮 umbrella, shop personnel monitor component 4, and from the monitoring component 4^; &quot; light / ^ source Will directly illuminate the reflected light will be in the photodiode: = ',, in addition, the optical current of the disc 5 is measured by the current voltage conversion amplification, and the VP is rotated and connected to the current and voltage. ;~:: Signal voltage reading device! The output terminal lb is outputted to the optical port of the output terminal: the two sides are not the reference package original π having the reference test f, and the non-inverted terminal is connected to the output of the base channel voltage control terminal 10b. The reverse end is connected to the supervisory unit 12, which is not reversed to the entrance level of 2; one end is connected to the output, and the other end is connected to the reference Thunder 11 to the floor cake G. The adjusting resistor 13 is connected to the optical reading 2 as it is applied. Therefore, the wheeling of the wheeling amplifier 12 is adjusted by increasing or decreasing the crying diode element 3 with the fixed impedance. And / melon 1111 size, by which can change 掸诘 + Μ 4 μ out and month b enough to increase or decrease the DC voltage Vo, also the output current Ip of the diode element 3 The size of the positive-polarization In A system is a standard solid-state switching composed of a plurality of reference fixed-resistors: 13C 槿Γ anti-inductance and inductance-connected snubber circuits 13β, and 4 are closed 13 (: constitutes the Adjust impedance

13C, the selection and snubber circuit 13R is connected to the reference fixed resistor by the switch. Strings such as the standard fixed resistance of the relay 1 3A its adjustment t way (four) connection side page 17 five, invention description (12) method.曰Correction adjustment circuit 1 光学The optical input of the wheel-in terminal of the driving Thunder element 3 接Continues to connect the laser diode element to the wheel to amplify the crying 12/^ wheel ^ 13, on the other hand, the m series continues And monitoring the terminal of the electric dust input terminal; in addition, the connection point control voltage of the adjustment and control element 4 is inserted into the completion 1 / the whole impedance state 1 3 is connected via the monitoring :Adjustment circuit!: Connected to the grounding terminal tc of the device f! "Connected, terminal 1〇C and connected to light: This DC voltage Vo is applied to the optical reading device"々 Input white* The output end of the control unit 4 is connected to the non-reverse of the output amplifier 12, by the "sequential connection method, optical reading device! 丄 / Λ: between the two connection terminals 8η, due to the buffer circuit solid m The selected standard fixed impedance 13 Α of the reference 4: 糸 is connected in series with the adjustment resistor 13 so that the monitoring element 经由 is synthesized via the fixed resistor 8a and the selected reference fixed path 10 : : : ί Impedance (and continuous impedance) and flow to the ground terminal G of the adjustment electric one (the buffer can be ignored) Impedance of 13 ). The impedance R must converge the output current scoop size of the photodiode element 6 within the allowable set range, for example, for the ideal current = in the positive and negative range, in order to make the resultant impedance R The resistance = value varies with a degree of engraving of about 2 to 3%. It is generally desirable that the photocurrent Im of the monitoring element 4 varies with the same degree of engraving. Generally, although the standard of the reference fixed resistor group is Fixed resistors have E24 series 1303417 SS 93133119 V. Invention description (13) Columns, E48 series of cases under the degree, therefore, continue to standard fixed quasi-fixed impedance this standard fixed resistance additional impedance, at that time, each The degree of engraving, if it is (Table 1) fixed impedance (Q) correction, E 9 6 series, etc., but if the standard fixed impedance is used alone, it cannot be completely satisfied with the above-mentioned engraving process. It is represented by the following table, the fixed resistor 8a that connects and couples the resistor is fixed at 4· 〇〇k Ω, and the standard 1 is wide; 48 is the system/two standard fixed resistor, if it is not resistant to 13A Base car The combined impedance R of the fixed impedance is used as the additional impedance progression of 4.22 kQ, which will become the same as the E96 series J. The degree of engraving. 4. 00k additional impedance combined impedance (Ω) (Ω) 乂32k 1. 814k 3· 48k 1. 861k l 65k 1. 908k, 83k 1. 957k “2k 2. 005k ^22k 2. 054k ^ 42k 2.100k ^ 64k 2.148k ^ 87k 2.196k 5· Uk 2. 244k 5· 36k 2.291k Degree of engraving (%) -2· 3 -2· 3 〜2· 3 -2· 4 One 2· 4

Page 19 1303417

The adjustment method of the optical reading device 1 using the above adjustment circuit is described. =^, the adjustment circuit 丨0 is connected to the optical reading device 丨, and a direct current 1 voltage Vo is applied to the laser diode element 3 to emit light, and the optical disc 5 is detected on the photodiode element 6 &amp; The reflected light is simultaneously monitored by the voltage meter connected between the output terminal lb and the ground terminal g, and the output current IP of the photodiode element 6 is converted into a voltage signal voltage vp. At the same time, by the switch 1 3C, the reference fixed resistor of the quasi-fixed resistor 13A is switched and coupled to the fixed resistor 8a. ^, the increase or decrease of the photocurrent Im of the monitoring component 4 can increase or decrease the output voltage of the output amplifier 12 of the singular circuit 10, so that the luminous intensity of the laser body element 3 can be increased or decreased. The output current IP of the photodiode element 6 is such that, in order to make the 旒=pressure VP measured by the voltmeter D fall within a predetermined range, by appropriately selecting the standard solid state The reference fixed resistor of the resistor 1 3A can adjust the output current IP of the photodiode element β to an appropriate level. In the example, as described above, the monitoring element is adjusted by the fixed impedance between the fixed resistor 2 of the optical reading device 1 and the standard fixed resistor UA of the adjusting circuit 1A, and the continuous impedance is adjusted. 4 The light current = the size, even if the impedance value of the reference fixed resistor group is scattered coarse ^ can be made into a finely set synthetic impedance, but also the moonlight, to excellent precision light Control of current I m .

^ 卜 : Although the use of the buffer circuit 13B is not necessary, by using the slow -3B, the surge generated by the switch 1 3C during switching can be reduced.

Page 20 1303417 Amendment . Case No. 93133m V. INSTRUCTIONS (15) ί Ϊ:::Ϊ:ΐ: Damage to the laser diode element 3 during the entire operation. In this way, in the selection of the reference electrode that can make the photodiode element into an appropriate level, the output pulse 1 F of the △ △ will be adjusted. Anti-two Λ ' can be read from the optical, the impedance value specified by the impedance χ will be fixed by the selected 8b, and then the additional resistor 8 "two = as an additional impedance splicing The terminal 8m and the second connection terminal are: f combines the first device 8 of the resistor 8. The bellows 811 are respectively soldered to complete the combined impedance energy, and the synthetic resistor 8 appropriately regulates the application of the DC: monitoring component The light current of 4 is 1m, and the 爿b is enough to set the photodiode element Du β. The output current of the body 6 is arrogant: the outside is like n::f: and the choice is suitable. In the case of the impedance value: secondly, the correlation between the photodiode element and the current Im is grasped, and the photocurrent I m is determined. =ί!, anti-time can be used for the electric meter! 0D. Chen ^ component 4 take the best example, in the example 1, the standard optical reading device 1 A: two impedance as Fixing the resistor 8a to form a resistance: a combination of two additional couplings 8b; the grounding of the d:B, by impedance and inductance Then ^ ι〇; &quot;:ΐ; :: J f; -.

—^^ --- The guard % continues to switch the switch 1 3C Page 21 1341417 Case number rib 133119 V. Invention description (16) = Increase or decrease the impedance value of the adjustment resistor 13 to change the photodiode The size of the output current ip of the component 6 is selected, and after selecting the reference current fixed impedance converges within the predetermined current range, the impedance of the reference fixed resistor is approximately the same impedance. After the additional resistor 8b is attached to the optical reading device 1, the photodiode output current IP can be appropriately set even if the fixed resistor is used. In the preferred embodiment 1, the reference fixed impedance constituting the impedance fixed resistor 13 切换 is switched to set the impedance value of the additional resistor 讣 of the SI: body element 6 of the current source 1 用以. However, in place of the adjustment resistor 13 and the J (four) device 15 to set the additional resistor 8b, in this case, in order to obtain the necessary setting of the variable resistor ^ to detect the shunt in the fixed impedance, yes, The galvanometer 16 of the photocurrent I..., and the variable resistor 15 are connected between the terminal G of the adjusting circuit 1A by the galvanometer 16 to detect the magnitude of the photocurrent Im. Im, the reference of the adjustment circuit 10, 'using the detected impedance value of the state 8a!^0, the impedance value RV of the fixed impedance 15 can be used; the variable resistor RV is expressed by the following equation (3) =(Ro * Vref)/(Iffi .R〇-vref)......(3) With k, the fixed impedance of the size specified by the value RV according to the above equation (3) will be crying ^ ° The impedance of the parent resistor 15

On page 22, the two ends of the additional resistor 8b are respectively; the second:: plus the resistor 8b' and the first connecting terminal 8m of the 8 and the second stub are connected to the synthetic resistor - Ground 1303417 MM 93i3^ng V. Invention Description (17) The output current IP of the photodiode element 6 is set at an appropriate level. In addition, the resistive state 15 is not used separately as in the prior art, but is connected to the fixed resistor 8a, so that it is not necessary to use high-precision components, and it can be increased in a highly accurate manner. The impedance of the impedance is reduced, and further, since the variable resistor 15 is not mounted on the adjusted optical pickup device 1, the high precision element may be used instead. In the above example, Although the light emitted by the laser diode element 3 is reflected by the optical disc 5 and received by the photodiode element 6, as shown in FIG. 3, instead of the optical disc 5, the light guiding member 17 is used. The light irradiated by the laser two element 3 is guided to the photodiode element 6 to be connected, so that the optical disk 5 does not need to be actuated, and the adjustment of the device can be made. As shown in Fig. 4, the intensity of the light-emitting intensity of the radiation-emitting diode element 3 measured by the radiation-receiving element 8a of the laser diode element 3 is incident on the surface of the photodiode element 6.亓杜〗 s, first, this 18, to &lt; seven on ten ^ 〇 〇 〇 件 件 件 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 18 (Best Embodiment 2) = In the preferred embodiment 1, 'Although the light β of the specification monitoring element 4 is made into the resistor 8 as a fixed impedance, only the L spoon is left ^ ^ — the parallel connection of the anti-zero sigma 8a and the additional resistor 8b Blocking, but also as shown in Fig. 5 'use the solid 乂 and anti-Is 8 d series connection in the synthesis °. σ and the resistor 8 are provided by the adjustment circuit to replace the synthetic resistance

----- Power generation to 丄υ Ζ 该 沭 沭 沭 你 你 你 你 你 U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U U Connected to the selection buffer circuit 13B in series with r:: the reference fixed resistor of the resistor 13A, and the second fixed resistor having the same impedance value as the impedance of the solid resistor 8c. 19: I=: Adjusting the impedance 1113Z The setting is made to achieve the most suitable output current IP of the photoelectric device and the body 70 member 6. — The composite resistor 8Z of the optical reading device 1 z of this example, in detail, has a fixed resistor 8c that is pre-combined in the combined resistor 8Z, and is used to connect the serial connection. The first and second connection terminals of the additional resistor 8d of the hacker 8c "the one end of the combined resistor 8Z, that is, the fixed impedance is crying 8c", the monitoring terminal 1m provided at the output end of the monitoring element 4, And fixed: the other end of the end state 8c is connected to the first connection terminal core, and the second connection terminal 8q of the other end of the impedance device 8Z is connected to the connection: 2: the adjustment impedance of the evening adjustment circuit 10Z One end of the device m is a voltage input terminal (10) and is connected to the ground terminal of the monitoring terminal lm terminal ^^ the whole circuit m, and in the preferred embodiment 2, the y system is different from the preferred embodiment 1, optical reading The ground terminal of the device lz is not connected to the adjustment circuit 10Z, and in this example, the photocurrent Ini of the monitoring element 4 does not flow to the fixed resistor 8c, but flows to the adjustment circuit 1 to adjust the resistor 13Z. ~ The photocurrent im of the device 4 is in this example also connected to the optical reading device 12 and the adjustment circuit 1〇z, and the DC voltage Vo is applied to the input terminal u of the optical reading device}, and the monitoring component is The output of 4 is connected to the opposite end of the output amplifier 12, and in addition, by the above connection, the monitoring element, page 24, 1034417

The base Ϊ resistor of the standard fixed resistor selected by the buffer circuit 13B and the switch 13C, and the first fixed resistor 丨9 connected in series to the standard fixed impedance ,13, and the grounding end of the flow adjustment circuit G, therefore, as the DC voltage v is applied to the laser diode element 3 to cause the basin to emit light, the light reflected by the optical disc 5 is detected by the photodiode element 6, and is spliced to the output terminal lb and the ground terminal G. The voltmeter between the two 监控D monitors the output current IP of the photodiode element 6 into a signal voltage of the voltage, and the reference of the standard fixed resistor 丨3 A is selected by the switch i 3 C. Solid, impedance state, to increase or decrease the magnitude of the photocurrent 丨1 of the monitoring component 4, increase or decrease: week, the output voltage of the output amplifier 12 of the circuit 10, to = the luminous intensity of the component 3, that is, due to The standard fixed yang p, which is selected by the standard fixed field anti-reflection anti-A1 3 A, is produced by the polar body element 6; the value is increased or decreased by the photoelectric dioxin, and the 丨丨 丨丨 哚 哚 广 广 广 广 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨 丨Therefore, the voltmeter 10D:=!! MVP can be included in the specified range, By a suitably selected reference unit 13A of the fixed resistor, to adjust the output of the photoelectric member 6 of the current 7L? Relevance to the level 1 diode. 'As described above' has an optical reading device u: 8,. The second fixed resistor 19 of the same impedance value, and by the tamping:: anti-::3A reference fixed resistor series in series, the small impedance value as the static feed m ^ with the resistance between the resistors:: In the case of the secondary reactor, since the standard fixed value is set to be extremely fine = material "the output current Ip of the component 6 of the combined resistor 8z can be synthesized. More...accurate way to adjust the photodiode

1303417

Case No. 931331 IQ 曰Revised Year 5, Invention Description (20) When the impedance value of the reference fixed resistor capable of setting the output current IP of the photodiode element 6 to an appropriate level is determined, the adjustment circuit is 10 is taken out from the optical reading device 1, and a fixed resistor of a size specified by the impedance value of the selected fixed fixed resistor is regarded as an additional resistor 8d', and both ends of the additional resistor 8d are respectively soldered to The first connecting terminal 8p and the second connecting terminal 8Q of the combined resistor 8Z complete the combined resistor 8Z formed by the fixed resistor 8c and the additional resistor 8d connected in series. Further, in the preferred embodiment 2, the reference fixed impedance of the standard fixed resistor 13A, which constitutes the adjustment impedance, is switched to set the output current ιρ for the most suitable photodiode element 6. The impedance value of the resistor 8d may be replaced with the variable resistor 13Z to set the impedance value of the additional resistor 8d. However, in this case, in order to obtain the impedance value Rq of the variable resistor, it is necessary to set the ammeter 16 to the adjustment circuit 1A to detect the photocurrent Im flowing to the resistor 19 and the variable resistor. the size of. Using the detected photocurrent Im, the base of the adjustment circuit 1〇, and the impedance value (fixed resistance &amp; impedance value) RP of the second fixed resistor 19 can be calculated by the following equation (4). Value Rq;

Rq = (Vref / Im)- Rp... (4) At the same time, a fixed impedance of a size specified by the variable impedance Rp calculated according to the above formula (4) is regarded as an additional impedance. . . , the impedance value plus the two ends of the resistor 8d are respectively connected by welding to the Asian

The first connection terminal 8p and the second connection At 〇 into the resistor 8Z ^ are connected to the terminal 8 q, and the 褕+

Page 26 The output of the diode element 6 is set to an appropriate level. Knife Ground Light 1034417 Case No. 93133119 V. Inventive Note (21) In addition, since the variable impedance device is connected in series to the second fixed resistor 19, a variable impedance device having a small variation in impedance value can be used. because. For the impedance value of the composite resistor 8Z, it is also possible to achieve a fine setting with the same. Further, in the above example, the additional resistor 8 (1 is set to be connected in series with the second fixed resistor 19 having the adjustment resistor 13 or the variable impedance and the fixed impedance with the impedance value. The resistor 丨3Z is adjusted, but the second fixed resistor 19 is omitted, so that even the first connection terminal (the connection terminal of the fixed resistor 8c end) 8p for connecting the additional resistor 8d, and the adjustment circuit 10Z The grounding terminal (; is connected between the adjustment resistor 丨3 or the variable impedance device to set the impedance value of the additional resistor 8d, and in addition, in this type of f-shaped, the photocurrent of the I-control element 4 The adjustment resistors 3 3 and the variable resistors 3 3 connected to the fixed resistors 8 c are connected to the fixed resistors 8 c or the variable resistors as described above. According to the present invention, the optical poles 7L can be lifted using an inexpensive fixed resistor. The accuracy of the output current and the cost of the optical reading device are reduced while ensuring high performance. Although the present invention has been described herein by way of specific embodiments, these are merely illustrative of the principles and applications of the present invention. Cooked ^ The person skilled in the art is able to modify all of them, but they are all protected by the scope. 町〒.月寻1303417 Case No. 93133Π9 Corrective drawing, simple description, Figure 1 Optical reading of the best embodiment of the present case FIG. 2 is a view showing another embodiment of the optical reading adjustment method of the present invention; FIG. 3 is a view showing another embodiment of the optical reading adjustment method of the present invention; Figure 5 is a representation of an optical reading adjustment method of the preferred embodiment 2 of the present invention. Fig. 6 is a diagram showing a prior art optical reading adjustment method. Λ _ [Component Symbol Description] 1 a Input terminal 1 c Ground terminal 2 Laser diode combination 4 Monitoring element 6 Photodiode element 8 Synthetic resistor 8b Additional impedance 1 0 Adjustment circuit 10b Monitoring voltage input terminal 1 0D voltmeter 1 2 Output amplifier 13A standard fixed Impedance 13C switching switch 1 optical reading device 1 b output terminal 1 m monitoring terminal 3 laser diode element 5 optical disk 7 current voltage conversion Amplifier 8a fixed resistor 8m, 8n first and second output terminals of the connecting terminal 10a 10c connecting the power supply terminal 11 of the reference resistor 13 to adjust the buffer 13 B crystal driving circuit 14

Page 28

Claims (1)

Case No. 93133Π9 VI. Patent Application No. 1304417 Correction 曰, .2 optical reading adjustment method, applied to laser diode components, detecting the illuminating quantity of the monitoring element, detecting the reflected light of the optical disc of the photodiode = And an impedance device connected to the wheel end of the monitoring component and limiting the monitoring element to detect current, the optical reading adjustment method is characterized in that: the resistor is treated as a fixed resistor, and is connected thereto. a composite resistor formed by an additional resistor of the subsequent portion; a switch having a switch and a (4) resistor having a known value of the fixed resistor selected by the switch, and an additional resistor Then, the terminal is connected; the connection of the fixed resistor of the fixed resistor is used to illuminate the laser diode element; and: the output current of the photodiode element is selected: After the internal reference fixed resistor, the rear-end terminal is added with a predetermined impedance value of three different impedance values of the resistor to adjust the impedance value of the combined resistor. -After the 2·ι:ϊί ί reading adjustment method, it is applied to the laser diodes # &gt; measuring /, the monitoring component of the light, the reflected light of the optical disc ^, and the connection The impedance of the monitoring element is characterized by: the impedance state of the field, and the additional impedance of the parallel portion of the parallel reactor;:: Fixed resistance; Connecting, after the sub-connector continues the additional impeder, and then transforming the value of the variable impedance of the variable resistor, causing the laser diode Page 29 1303417 - Cold number _I month s Correction A 'Application full-time II - component illumination; and ^ adjustment can converge the output current of the photodiode element to the impedance value of the variable impedance in the specified range Then, an additional resistor having an impedance value approximately equal to the adjusted value of the resistance value is followed by the rear terminal to adjust the impedance value of the composite resistor. 3. An optical reading adjustment method applied to a laser diode component, a monitoring component for detecting the amount of light emitted, a photodiode π component for detecting reflected light of the optical disk, and an output connected to the monitoring component The resistor for detecting the current is limited, and the resistor is used as a fixed resistor, and an additional resistor connected in series to the fixed portion of the fixed resistor rm. a synthetic resistor; an adjustment resistor having a switch and a reference fixed resistor group having a known value selected by the switch, connected to the terminal for connecting the additional resistor in series; 1 switching the serial connection The same fixed impedance of the fixed resistor is fixed to the laser diode element; and the output current of the photodiode element is converged within a predetermined range. After the quasi-fixed impedance device, an additional resistor having an impedance value approximately equal to the selected impedance of the reference solid and the impedance is connected to the rear terminal 'to adjust the synthesis Impedance value of the reactor. 4 · A kind of optical reading adjustment method is applied to the monitoring component of the laser diode to measure the illuminating quantity thereof, and detecting the light of the reflected light of the optical disc; the pole; the element, and the connection to the output end of the monitoring component and limiting The resistor for detecting current of the monitoring component, the optical reading adjustment method is characterized by: Case No. 931331 VI. Scope of Application for Patent 曰 The output current of the 9L piece of the Nine Electric One converges to the specified standard 1303417 _Correct the resistor as an additional resistor for the second component of the fixed resistor; and the series connected to the fixed resistor to connect the variable resistor to the composite resistor used for: sub; After the additional resistor is connected, the blocking element of the variable impedance device is connected to emit light, and the value is the same, so that the laser diode can adjust the photodiode The impedance of the variable impedance current converges to a predetermined impedance value that is approximately the same as the impedance value 1: f has an impedance value adjusted to shed the composite resistor. Stupid and 5 · An optical reading adjustment method, measuring the illuminating amount of the monitoring component, detecting each of the diode components, detecting components, and the photodiode following the reflected light of the disc The current-measuring resistor, the optical reading device is regarded as a fixed resistance t, and the method of the positive-reduction method is characterized by the additional configuration of the rear portion of the anti-surge device. Impedance; a 50% resistor formed by the resistor, instead of having the same resistance value as the switching resistor and the adjustment resistor having the reference fixed resistor group, and the fixed impedance of the known value selected by the reference: : two series connection, continued to have an output end connected to the monitoring element with the solid-state reactor; the impedance formed by the impedance is blocked by switching the reference fixed resistance light; and the anti-TM is the same as the laser diode element In the choice, the first mine can be identified. 1303417 Amendment —-----931331 IQ VI. Apply for the patent scope; select the benchmark::: to adjust the resistance of the synthetic resistor: ... followed by 6_ kinds of learning read adjustment method, The monitoring component, the detecting optical component, the detecting component, and the resistor connected to the detecting current of the monitoring component, and the detecting current of the photoelectric body, the optical component is connected to the monitoring component The chase 2: the connection continues with the fixed resistance synthetic resistor; the synthetic resistor formed by the anti-°°, instead of the series connection of the compliant impedance state with the solid. - the value of the second fixed resistor formed by the adjustment u is the same as the output terminal of the impedance member; the resistance element is connected to the monitoring element to convert the impedance value of the variable impedance device to emit light; and the laser is allowed to serve the laser The pole body can adjust the impedance of the impedance value of the variable resistor in the electric diode i# to converge to an additional 2f舆 of the impedance value which is approximately the same as the predetermined value. Adjust the impedance value of the composite resistor. The anti-battery is connected to the rear terminal, and the light-receiving light of the second-pole element is received by the photodiode element as received by any of the photodiode elements. . The attack is the lightning reflected by the optical disc. 8. If the photodiode is used in any of the sixth paragraphs of the patent application, the photoelectric diode is received by the photodiode, and the light received by the body is Via the light guide member ^ page 32 1303417 J No. 93mm Patent application scope Q Guide 2, the light emitted by the laser diode component. 9. If the application of the patent range 1 to 6 _ top hurricane ^ in the photodiode element received by the light system ^ = the entire method, the component is illuminated by the output of the receiving element of the first line of light intensity 10 · For example, the patent application scope #3 # RL parallel buffer circuit fish # take adjustment method, which is 11 · an optical reading circuit, package 'short shame. The monitoring component of the light quantity, the detection well, the field, the limb, the detection of the ferroelectric diode element connected to the monitoring element, the current resistor, and the detection of the fixed component of the monitoring component The follower terminal of the additional resistor is connected to the second or the series connected to the solid state. ^ An optical reading adjustment device for use in an optical reading device according to any one of the patent applications, comprising: a reference power source that generates a reference voltage; a non-inverting terminal connected to the reference power source, and a reverse terminal connection The output amplifier of the output end of the monitoring component; and one end is connected to the non-inverting input end of the output amplifier, and the other end is connected to 'the ground side of the reference power supply' is an adjustment resistor for adjusting the photocurrent of the monitoring component. ^ · The optical reading adjustment device of claim 12, wherein the two resistors are fixed by a reference fixed resistor having a known value, and the reference of the ground fixed fixed resistor group is fixed. Impedance switching 1303417 f) Page 34 1303417 Case No. 93133119 Λ_η Amendment 6. Designated representative figure (1), representative figure of the case is ·· _ (2), component of the representative figure 1 optical reading device lb output terminal 1 m monitoring terminal 3 Laser diode element 5 CD 7 current voltage conversion amplifier 8 a fixed resistor 8m, 8n first and second connection 1 0 a output terminal 10c connection terminal 11 reference power supply 1 3 adjustment resistor 1 3B buffer circuit 1 4 Driving transistor diagram representative symbol simple description: 1 a input terminal 1 c ground terminal 2 laser diode combination 4 monitoring element 6 photodiode element 8 synthetic resistor 8b additional impedance sub- 1 0 adjustment circuit 10b monitoring voltage input Terminal 1 0 D voltmeter 1 2 output amplifier 13A standard fixed resistor 13C switch Page 5