JPH0917577A - Output light generating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always fix an output from a light source at work time even when the light output of the light source is decreased due to deterioration over ages by fixedly controlling an electrical output by an electrical output command means in a lighting period, and fixedly controlling the light output by a light output command means when necessary thereafter. SOLUTION: The first sequence control means 30 generates a current section signal by an output signal of an electric output detecting means 40, to turn off a changeover switch S1 and on S2 , when provided this section signal, to perform feedback control of a light output by an output signal from a light output detecting means 26, and to turn on the switch S1 and off S2 , when not provided this section signal, to perform feedback control of an electric output by an output from the electric output detecting means 40. When a work command switch 44 is turned on, a work command signal is output from the second sequence control means 41 to the means 30, to turn on the switch S2 and off S1 , only when turned on the switch 44, to perform feedback control of a light output. In a circuit, removing the second error amplifier 28, switch S2 , means 41 and the switch 44 from a control circuit, control of setting an electric output command means 31, while watching a light output display means 39 by a worker, is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light output generating device for focusing light from a light source on a focal point and performing brazing, soldering, resin peeling, resin bonding and curing, and the like.

[0002]

2. Description of the Related Art As a method of processing a workpiece using light from a light source, a xenon lamp using arc discharge,
There was a method using a mercury lamp.

In a xenon lamp, a direct current power source output is applied to the positive electrode and a negative voltage is applied to the negative electrode to cause a constant current arc discharge to emit light.

In a xenon lamp or the like, even when a constant current is applied, the light output decreases with the passage of time, and the variation in the light output increases. Could not process.

FIG. 11 is a diagram showing a change with time in light output. In FIG. 11, the horizontal axis represents time T and the vertical axis represents optical output W. WF is the light output when the light source is new, and WG is the light output after the elapse of the Tn time, which is shown in watts. In the experiment, WG drops to about 80% of WF after 700 to 1200 hours. That is, when the light source generates the WF output, even if the processing condition of the workpiece is determined, the output of the WG is insufficient by 20% after the time Tn. This is because the xenon lamp has a thin cathode and makes it difficult to emit electrons from the cathode.

[0006]

As apparent from the above description, the conventional optical output generator has the following problems.

(1) The light output WG of the light source used for a long time is
It is 80% of the light output when new. Therefore, the processing conditions of the workpiece must be changed with time, and setting of the processing conditions requires time and skill.

(2) It is not suitable for mass production because the processing conditions of the workpiece change with time.

(3) Further, since thermionic emission is unstable in the arc discharge, the fluctuation of the light quantity immediately after lighting (about 10 minutes) is large, and when the light source is old, the fluctuation of the light quantity becomes large.
There is a problem that reliable processing cannot be performed stably.

An object of the present invention is to provide an optical output generator capable of constantly keeping the optical output from a light source during processing in view of the above-mentioned conventional problems.

[0011]

In order to achieve the above object, a light output generator of the present invention comprises a light source using arc discharge, a lighting means for the light source, and a control power supply for supplying power to the light source. A light output generating device including a reflecting mirror that collects light from the light source at a first focal point until the light source is turned on or a stable light output is generated after the light source is turned on by the lighting means. The first sequence control means for performing the sequence control by distinguishing the lighting period from the following period is provided, and the electric output commanding means for instructing the control power source so that the light source current is preset within the lighting period is provided. Light output command means for commanding the control power source to generate a preset light output in all or a part of the period after the lighting period is provided.

The second optical output generator of the present invention is
In a light output generation device comprising a light source using arc discharge, a lighting means for the light source, a control power supply for supplying power to the light source, and a reflecting mirror for condensing light from the light source at a first focal point. The control power supply includes an error amplifier for amplifying a difference between an output value of the electric output command means and an output value of the electric output detection means for detecting a current flowing through the light source, and a conduction time and a non-conduction time depending on an output of the error amplifier. A power control means for setting a width, and the electric output command means stores a light output detection means for detecting a light output from the light source, and a relationship between a known light source current and a light output from the light source. First memory means, second memory means for storing the relationship between the light source current and the light output from the light source when the light source changes with time, and the light source changed with time from the data of the first and second memory means Corresponding to finger It is provided with a calculating means for correcting calculating the value.

The third optical output generator of the present invention is
In a light output generation device comprising a light source using arc discharge, a lighting means for the light source, a control power supply for supplying power to the light source, and a reflecting mirror for condensing light from the light source at a first focal point. The control power source detects a light output from the light source, a light output display unit that displays the detected light output, an electric output command unit, an output value of the electric output command unit, and the light source. An error amplifier for amplifying a difference between output values of an electric detection means for detecting a current flowing through the power amplifier, and a power control means for setting a width of a conduction time and a non-conduction time by an output of the error amplifier are provided.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION According to these light output generators of the present invention, the light output is made constant even when the light from the light source which changes with time is used for processing the workpiece. The processing quality of the work piece can be kept constant.

An optical output generator according to an embodiment of the present invention will be described below with reference to FIGS.

First, the overall configuration of the light source control power supply will be described with reference to FIG. 1 is a rectifier of an AC power supply. 2 is a power control means, a choke coil 3, a capacitor 4,
5, a primary coil 6 for an inverter, and transistors 7 and 8. B1 and B2 are base terminals of the transistors 7 and 8, and E1 and E2 are emitter terminals thereof.

Reference numeral 9 is a secondary coil for an inverter, and its output is rectified by rectifiers 10 and 11. Reference numeral 12 is a DC reactor, and 13 is a capacitor, which removes ripples on the secondary output side. Reference numeral 14 denotes a current detector such as a shunt or a current transformer. Reference numeral 15 denotes a high-frequency coupling coil, 16 denotes a lighting unit, and 17 denotes a lighting start switch. Reference numeral 18 denotes a light source such as a xenon lamp or a mercury lamp, and includes a cathode 42 to which a negative polarity is applied and an anode 43 to which a positive polarity is applied.

P1 indicates the output of the current detector 14, and P2 indicates the output of the lighting means 16. Next, the overall configuration of the light output generator other than the control power supply will be described with reference to FIG. 19 is a cooling fan of the light source 18, and 19a is its fan motor.
Reference numeral 20 denotes an elliptical reflecting mirror, and one of the focal points F0 has a light source 1
Eight cathodes 42 are arranged, and the light L emitted from the light source 18 is focused on the other focus F1 through the light path (light transmission path) as shown by the arrow. The workpiece 100 is placed near the focus (first focus) F1 or the entrance end 101 of the optical fiber 21 is arranged. Reference numeral 60 denotes an exit end of the optical fiber 21. The condenser lens 22 is disposed near the exit end, and the workpiece 100 is placed at the focal point (second focal point) F2.

Reference numeral 24 is a photodetector for detecting the optical output,
P3 indicates the output. The photodetector 24 includes a PN junction type photodetector such as a phototransistor or a photodiode (charges excited by light are generated on both sides of the PN junction and pass through an external load connected to the anode and the cathode. A pyroelectric sensor for detecting infrared rays (lithium tantalate crystal), a photoconductive type (an optical sensor whose electric resistance changes according to light intensity), a Cd cell, a PbS cell,
In addition, a photoelectron emission type phototube, a thermocouple (a thermoelectromotive force generator using the Peltier effect), and the like are used.

As shown by the solid line in FIG. 3, the photodetector 24 directly detects the light from the reflecting mirror 20 or leaks the light from the optical fiber 21 (incident at an aperture angle or numerical aperture of the optical fiber or more). It may be arranged so as to detect such light).
Further, it may be arranged so as to detect light from the output end 60 of the optical fiber 21 and the condenser lens 22. When a thermocouple is used, the thermocouple is arranged in contact with the workpiece 100, and when an infrared radiation thermometer is used, the thermocouple is arranged to face the workpiece 100 as shown by a broken line. Further, the light output may be detected by a detector having a thermocouple attached to a metal body.

Further, as shown in FIG.
Is mounted on the moving means 110, and is intermittently moved in the vicinity of the transmission path of the light L, the first focus F1, the second focus F2, or between the exit end 60 of the optical fiber 21 and the condenser lens 22, The output signal of the photodetector 24 is amplified by the amplifier 25 and stored in the memory means 111.
It is also possible to input 4 to the feedback terminal. After being stored in the memory unit 111, the photodetector 24 moves in a direction that does not obstruct the transmission path of the light L, and the memory value is continuously stored until the photodetector 24 detects the light again in the next cycle. Update memory value on detection. In this case, the light output measuring operation is performed when the processing instruction signal in FIG. 6 is not input. Further, by providing a large number of memory means 111, a large number of optical outputs during processing can be stored. Also, a photodetector 24 is installed at the work origin, and the optical fiber
1 is moved to the vicinity of the photodetector 24 and the memory means 11 is moved.
It is also possible to store the light output in 1.

In the configuration of FIG. 2, the power control means 2 is composed of a half-bridge type inverter circuit,
The conduction time and the non-conduction time of the transistors 7 and 8 are determined periodically to control the output. That is, the AC is rectified by the rectifier 1, the ripple is removed by the choke coil 3, the capacitors 4 and 5, the transistors 7 and 8 are alternately turned on and off at a fixed cycle, and the inverter primary coil 6 and the inverter 2 Power is transmitted to the next coil 9. This is a rectifier 10,
The current is rectified by 11, the ripple is removed by the DC reactor 12 and the capacitor 13, and the ripple is applied to the light source 18.

When the light source 18 is started, a voltage of 3000 to 20000 V is applied from the high frequency coupling coil 15 as a trigger for discharging between the cathode 42 and the anode 43, and the light source 18 is turned on. If a current flows between the cathode 42 and the anode 43, the application of the high voltage from the high-frequency coupling coil 15 is stopped. That is, the transistors 7 and 8 are driven, the lighting start switch 17 is turned on, the lighting means 16 generates a high voltage, and the high voltage is output to the high-frequency coupling coil 15, so that the light source 18 is turned on and the lighting means after lighting is turned on. 16 operations stop. This switching is performed by first sequence control means 30 in FIG. 1 described later.

FIG. 2 shows a circuit for arc discharge. In an arc discharge lamp, it is appropriate to perform constant current control by performing control using a current as a feedback source, but it is not absolutely necessary to have a constant current.

The signal detected by the current detector 14 is amplified by the amplifier 29 and transmitted to the next stage as shown in FIG. The current detector 14 and the amplifier 29 constitute an electric output detection means 40. The signal detected by the photodetector 24 is also amplified by the amplifier 25 and transmitted to the next stage as shown in FIG. The photodetector 24 and the amplifier 25 constitute a light output detecting means 26.

Although FIG. 2 illustrates the inverter type control power source, a thyristor control system, a leakage transformer system (constant current system), a constant voltage transformer system, or a chipper system control system may be adopted.

Next, the control circuit of the control power supply shown in FIG. 2 will be described with reference to FIG. Numeral 31 denotes an electric output commanding means for instructing to output a predetermined current and voltage. The electric output commanding means is configured to apply a voltage to both ends of the volume and output a center voltage. Either may be used. Reference numeral 23 denotes an electric output display means for displaying a value detected by the electric output detection means 40.

Reference numeral 32 is a first error amplifier, which is mainly composed of an operational amplifier 33. The + sign in the operational amplifier 33 indicates non-inversion, and the − sign indicates an inverting input terminal. Also, R
1, R2, R3, R4, and R5 are resistors, 55 is a positive power source, E is ground, X1 is an input from the electrical output detection means 40, X2 is an input from the electrical output command means 31, X1 is a positive polarity, X2. Is-polar. X3 is an output terminal of the operational amplifier 33.

The voltage values of X1, X2 and X3 are VX1 and VX.
2. If VX3 and A = R5 / R3 and B = R5 / R2, VX3 = -A * VX2-B * VX1 (* indicates a product), and the electric output (current, voltage) VX1 increases. If VX3 is reduced. If the command voltage VX2 increases, VX
Since V2 increases in the negative direction, VX3 increases. Therefore, the error between X1 and X2 is amplified by the operational amplifier 33 and output to X3.

S1 and S2 are changeover switches, which are interlocked so that when S1 is on, S2 is off or vice versa. X7 is an output from the changeover switches S1 and S2. 34 is a reference device, 35 is a comparator,
These form an output width control means 36.
X8 is the output of the reference unit 34, and X9 (X10) is the output of the output width control means 36. 37 is a driver, B1,
E1, B2 and E2 are control inputs to transistors 7 and 8 in FIG.

In FIG. 4, reference numerals 45 and 46 are control signal diagrams for explaining the operation of the output width control means 36. The output X3 of the first error amplifier 32 or the output X6 of the second error amplifier 28 is shown.
Outputs X9 and X10 having a width corresponding to the input X7 are output. That is, X8 is a triangular wave signal having a fixed period outputted from the reference unit 34, X7 is an output of the first or second error amplifier 32, 28, and indicates a case where the signal decreases as time progresses. This is shown in FIG. X
If 7> X8, signals X9 and X10 are generated in the signal diagram of FIG. If X7 decreases with time, the X9 signal width> X10 signal width. That is, in this case, an example is shown in which the output width of the output width control means 36 decreases so as to gradually approach VX2 as VX1 increases. Thereafter, the driver 37 alternately converts the X9 signal into B1 and E1 signals and the X10 signal into B2 and E2, and drives the transistors 7 and 8.

Returning to FIG. 1, 27 is an optical output command means, which has the same structure as the electrical output command means 31. Also,
39 is a light output display means for displaying the light output detected by the light output detection means 26. A second error amplifier 28 has the same configuration as the first error amplifier 32 and may be commonly used. X4 is an input from the light output detection means 26, X5 is an input from the light output command means 27, X6
Is the output of the second error amplifier 28 and is input to the output width control means 36 as X7 via the changeover switch S2.

Reference numeral 30 denotes a first sequence control means, which controls switching of the changeover switches S1 and S2. Reference numeral 41 denotes a second sequence control means, which is turned on by the processing instruction switch 44 to output the electric output command means 31 or the light output command means 2.
By changing the command voltage of No. 7, the light output can be changed so that the workpiece can be processed. Numeral 38 is an upper limit value setting means for outputting a signal for stopping the output of the comparator 35 when the output of the electric output detecting means 40 is larger than the set value.

Next, the relationship between various signals and the light source current and light output will be described with reference to FIG. (a) is a lighting signal, which is a signal between T0 and T7 in the lighting means 16 when the lighting start switch 17 is turned on. (b) is a processing instruction signal, which is T3 to T4 when the processing instruction switch 44 is turned on.
And between T5 and T6. Note that a section in which the processing instruction signal is at a low level other than the processing instruction section having the processing instruction signal between T0 and T7 is referred to as a preparatory lighting section.
(c) is a current flowing through the light source 18, that is, the electric output detecting means 4.
0 output. (d) is a current section signal indicating a section in which the current has flowed over a predetermined level. (e) is the light output.

In FIG. 6, the horizontal axis represents time, T0,
T1 to T7 and T8 indicate arbitrary times. IA, IB, IC
Is current, WA, WB, WC, WD, and WE are optical outputs. FIG. 6 shows an example in which the constant light control is performed only when there is the processing instruction signal (b), and the light output of WB and WD is constant irrespective of the temporal change of the light source 18 and the like. On the other hand, as shown in (e), the light output between T0 and T2 is unstable. Further, IB and IC correspond to WB and WD, IA corresponds to WA, WC and WE, IA is an idling or standby period, and the light output is not constant.

Next, various control operations will be described. (1) The first sequence control means 30 uses the output signal of the electrical output detection means 40 to output the current section signal (T1) shown in FIG.
Signal between T7 and T7), and when this current section signal is present, the changeover switch S1 is turned off and S2 is turned on to perform feedback control of the optical output by the output signal from the optical output detection means 26, and this signal is not present. At the time (between T0 and T1), the changeover switch S1 is turned on and S2 is turned off to perform feedback control of the electric output by the output signal from the electric output detecting means 40.

(2) When the machining instruction switch 44 is turned on, the second sequence control means 41 outputs the machining instruction signal shown in FIG. 6B to the first sequence control means 30, and the machining instruction switch 44 is turned on. Only in this case, the changeover switch S2 is turned on and S1 is turned off to perform feedback control of the optical output.

(3) From the control circuit of FIG. 1 to the second error amplifier 2
8, changeover switch S2, second sequence control means 41,
With the circuit excluding the processing instruction switch 44, the operator can also perform control to set the electric output command means 31 while looking at the light output display means 39.

(4) As shown by the broken line in FIG. 3, the fan control means 61 is provided, and the fan control means 61 is controlled by the output X6 of the second error amplifier 28. If the optical output falls below the command, the fan 19 Stop or decelerate, if not, fan 1
9 is rotated or accelerated. That is, by such control, thermionic emission of the cathode 42 is controlled by controlling the temperature of the cathode 42, and the light output is controlled.

(5) As shown by the broken line in FIG. 2, the heater 62 is attached to the outside of the lamp tube of the cathode 42 and the heater control means 63 is provided, and the heater control means 63 is controlled by the output X6 of the second error amplifier 28. Then, the light output is controlled as in (4). The light output increases as the cathode temperature increases. The reason is that the cathode changes from a cold cathode to a hot cathode,
This is because electrons are easily generated from the cathode.

Next, another embodiment of the present invention will be described with reference to FIGS. In FIG. 7, M1 is the first memory means, M2 is the second memory means, C1 is the first computing means, and C2.
Is a second arithmetic means, M3 is a third memory means, C3 is a third arithmetic means, and M4 is a fourth memory means. 56 is a comparing means. Electric output command means 31, electric output detection means 4
0, the optical output detection means 26, the first error amplifier 32, the output width control means 36, and the driver 37 are the same as those in the above-described embodiment. A / D is an analog-digital converter, D / A
Indicates a digital-analog converter.

In FIG. 8, the horizontal axis represents the current I and the vertical axis represents the optical output W. a is a function of the initial characteristics of the light source 18 a: W = N
* (I-IP), and b indicates a function b: W = J * (I-IP) of the characteristic when the light source 18 changes with time. N,
J is a proportional constant of the functions a and b, and IP is a current value when W is 0. W0 is the light output on a at I0, W01 is I0
On b, an optical output on b is generated, and on b, an optical output on W0 is generated at I01. At this time, N = W0 / (I0−IP), J =
W01 / (I0-IP). W0, I0, IP are known and W01 is unknown.

In the functions a and b, in the above, I
Although P is the same, it is not necessarily the same, and in that case, the number of light detections and the number of calculations may be increased by the increased unknown number. IM is an allowable upper limit current, and IL is a light source emission lower limit current value.

The function a is stored in the first memory means M1,
The function b is stored in the second memory means M2.

It is now assumed that the light output is measured at I0 at an arbitrary time after the start of use of the light source 18, and it is W01. Here, the function b having the unknown value of the second memory means M2 is input to the first calculation means C1, the light output W01 detected by the light output detection means 26 is input to the first calculation means C1, and further the electric output By inputting I0 commanded by the commanding means 31 into the first calculating means C1 and substituting I0 and W01 into the function b, J becomes a known value and the function b becomes a known function.

Next, the known function b is calculated by the second calculating means C2.
And the output W0 at the time of the current I0 is input from the first memory means M1, and the current I0 at the time of the W0 output on the known function b is input.
Find 01. This I01 is I01 = (W0 / W0
1) * (I0−IP) + IP. And K = I0
1 / I0 is calculated and input to the third memory means M3. This K is expressed as K = (1 / I0) * ((W0 / W01) * (I
0-IP) + IP). This K is stored in the third memory means M3.

At the time of processing, it is assumed that the command current of the electric output command means 31 is IX, and the light source 1 changed with time.
In order to obtain the actual command current for obtaining the standard output with 8 (known function b), IX and K are input to the third computing means C3, and I
Calculate X * K. If the light source 18 is driven by this IX * K, the same light output W0 as the light source when it is new can be generated even with a light source that has changed over time.

Next, this calculation result is input to the comparison means 56, and a predetermined maximum current IM is compared with the input from the fourth memory means M4, and if IX * K> IM, then I
M, otherwise outputs IX * K, and inputs it to the command input terminal to the first error amplifier 32 via the D / A converter. The output from the electric output detection means 40 is input to the feedback terminal of the first error amplifier 32, and is controlled in the same manner as in FIG.

The above arithmetic processing may be implemented by software by a microcomputer as shown by the broken line in FIG. Further, the fourth memory means M4 and the comparing means 56 may be deleted.

Next, a concrete configuration example of the light output detecting means 26 will be described with reference to FIG. In FIG. 9, L is light, and light L indicated by a solid line is light incident on the entrance end 101 of the optical fiber 21 at an angle within the aperture angle g of the fiber.
Is indicated by a broken line. 47 is a filter for light attenuation, 48
Denotes a photodetector such as a photodiode, and a photodetector 48.
Is arranged to detect another light 57 via the filter 47.

Further, 51 is a clad material for the optical fiber 21,
Reference numeral 52 denotes a core material, and the refractive index of the clad material 51 (eg, 1.4)
2) is smaller than the refractive index (eg, 1.46) of the core material 52. Reference numeral 54 denotes light that enters within the opening angle g and propagates while being totally reflected by the cladding material 51, and reference numeral 53 denotes light that enters at an angle h larger than the opening angle g and leaks from the core material 52.

Reference numeral 49 is a photodetector such as a photodiode arranged at a side portion near the entrance end 101 of the optical fiber 21 to detect leak light, and 50 is provided in the clad material 51 to increase the leak light. The photodetector is arranged so as to face the opening.

Next, the optical output detection 2 in the case of using a bundle fiber in which many optical fibers 21 are bundled and fixed with resin
The configuration example of No. 6 will be described with reference to FIG. As in the case of FIG. 9, the photodetector 71 is arranged on the side portion near the entrance end 101, or an arbitrary optical fiber is bent laterally near the exit end 60 so as to face the tip thereof. A photodetector 72 is disposed, or light emitted from the exit end 60 is focused on the second focal point F2 by the condenser lens 22 to detect reflected light when the workpiece 100 is processed. The container 73 may be arranged.

These photodetectors 48, 49, 50, 71,
Any of the arrangements 72 and 73 is selected and implemented. It is preferable to use an operational amplifier of FET (field effect transistor) input as the photodiode amplifier. In order to reduce the junction capacitance of the photodiode and make it respond fast,
Reverse bias control should be performed.

The present invention can also be applied to a laser processing machine.

[0056]

According to the light output generator of the present invention, the electric output command means controls the electric output to be constant during the lighting period, and the light output command means controls the light output when necessary thereafter. Since control is performed so as to be constant, even when light from a light source that changes with time is used for processing a workpiece, high-quality processing can be performed with a constant light output.

Further, the change in the light output due to the change over time of the light source is detected and stored in memory, and the electric output calculated so as to obtain a predetermined light output is applied to the light source to control the light output command means. The light output can be made constant while omitting the configuration, and the number of times the light output is detected can be reduced.
The life of the light output detecting means can be extended.

Further, by setting the upper limit value of the electric power supplied to the light source so that the current exceeding the upper limit value does not flow, the life of the light source can be extended.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a control unit of a power control unit in an optical output generator according to an embodiment of the present invention.

FIG. 2 is a block diagram of a control power supply

[Fig. 3] Overall configuration diagram

FIG. 4 is a signal waveform diagram for explaining the operation of the output width control means.

FIG. 5 is an explanatory view of a modified example of the optical output detection means.

FIG. 6 is a waveform diagram of various signals, light source current, and optical output.

FIG. 7 is a configuration diagram of a control unit of power control means in another embodiment of the present invention.

FIG. 8 is a graph showing a relationship between current and light output for explaining a method of setting electric output for a light source that has changed over time.

FIG. 9 is a diagram showing an arrangement configuration example of a photodetector.

FIG. 10 is a diagram showing an arrangement configuration example of another photodetector.

FIG. 11 is a graph showing the change over time in the light output of the light source.

[Explanation of symbols]

 2 Power control means 16 Lighting means 18 Light source 19 Cooling fan 20 Reflector 21 Optical fiber 22 Condensing lens 23 Electric output display means 26 Optical output detection means 27 Optical output command means 28 Second error amplifier 30 First sequence control means 31 Electricity Output command means 32 First error amplifier 36 Output width control means 38 Upper limit value setting means 39 Optical output display means 40 Electric output detection means 41 Second sequence control means 56 Comparison means 61 Fan control means 62 Heater 63 Heater control means M1 First Memory means M2 Second memory means M3 Third memory means M4 Fourth memory means C1 First computing means C2 Second computing means C3 Third computing means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location H05B 41/29 H05B 41/29 A

Claims (3)

[Claims] 1. A light source using arc discharge, a lighting means for the light source, a control power source for supplying electric power to the light source, and a reflecting mirror for condensing light from the light source to a first focal point. In the light output generation device, there is provided first sequence control means for performing sequence control by distinguishing a lighting period from a time when the light source is turned on by the lighting means until the light source is turned on or a stable light output is generated and a subsequent period. Providing an electric output command means for instructing the control power supply so that the light source current is preset within the lighting period, and the preset light output in all or a part of the period after the lighting period is provided. An optical output generation device comprising an optical output command means for instructing a control power source to generate the optical output. 2. A light source using arc discharge, a lighting means for the light source, a control power source for supplying electric power to the light source, and a reflecting mirror for condensing light from the light source to a first focal point. In the optical output generation device, the control power supply includes an error amplifier that amplifies a difference between an output value of the electric output command means and an output value of the electric output detection means that detects a current flowing through the light source, and a conduction time by an output of the error amplifier. And a power control means in which the width of the non-conduction time is set, the electric output command means,
Light output detection means for detecting the light output from the light source, first memory means for storing the relationship between the known light source current and the light output from the light source, and the light source current when the light source changes with time and the light source Second memory means for storing the relationship of the light output from the first and second memory means, and arithmetic means for correcting the command value corresponding to the light source that has changed with time from the data of the first and second memory means. Optical output generator. 3. A light source using arc discharge, a lighting means for the light source, a control power source for supplying electric power to the light source, and a reflecting mirror for condensing light from the light source to a first focal point. In the light output generation device, the control power source includes a light output detection unit that detects a light output from the light source, a light output display unit that displays the detected light output, an electric output command unit, and an electric output command unit. An error amplifier for amplifying a difference between an output value and an output value of an electric detection means for detecting a current flowing through the light source, and a power control means for setting a width of a conduction time and a non-conduction time by an output of the error amplifier. An optical output generation device characterized in that.