JPH02288152A - Ultraviolet metal halide lamp - Google Patents

Abstract

PURPOSE: To improve radiation efficiency within wavelength ranges of 340-400nm and of 350-370nm by housing an electrode inside a bulb, enclosing a filler, which contains mercury, iodine and/or bromine, ion and the like, and inert gas inside the bulb, and specifying a ratio of respective constituents of the filler. CONSTITUTION: Electrodes 3, 4 are housed in the inside 2 of a bulb 1 made of transparent quartz glass, and the inside is filled with a filer, which contains mercury, iodine and/or bromine, iron, cobalt, and nickel, and inert gas. In the filler additionally containing lead, ratios of constituents as a unit of mg/cm<3> are as follows: 0.31240-5.24600 of mercury, 0.03100-1.09860 of iodine and/or bromine, 0.00500-0.03500 of iron, 0.00450-0.03500 of cobalt, 0.00010-0.02000 of nickel, and 0.00584-0.12100 of lead. In this way, radiation efficiency within wavelength ranges of 350-370nm and 340-400nm can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to illumination optics, and more particularly to ultraviolet metal halide lamps.

Ultraviolet metal halide lamps are used in photographic industrial processes and phototherapy, for example for irradiating photosensitive polymer transfer layers in the manufacture of printed circuit boards and printing forms.

[Conventional technology]

Ultraviolet metal halide lamps, as known in the art, are constructed as an inert gas-filled glass bulb containing electrodes and a filler; The agent is mercury and lead iodide Pb
■Contains 2 in the following proportion (mg/cm) (Soviet inventor's certificate (S[1-A) No. 377923).

Mercury 2.600-3.70 Lead iodide 0.054-0.66 However, the radiation efficiency of this ultraviolet metal halide lamp is in the wavelength range 350-370 nm and 340-40 nm.
0 nm is not high enough. The radiation efficiency is 6% in the wavelength range of 350-370 nm and 10% in the wavelength range of 340-400 nm.

Another known ultraviolet metal halide lamp is constructed as a glass bulb filled with an inert gas and contains electrodes and a filler containing mercury, iodine and/or bromine, iron, It contains cobalt and nickel (US Pat. No. 4,155,025).

The total content of iron, cobalt, and nickel is 0.01 to 1.
00 mg/ctl, and the iron content is no more than 50% of its total amount.

The radiation efficiency of this lamp is not high enough, 310
6% in the wavelength range ~350nm, 20% in the wavelength range 340-400nm, 1 in the wavelength range 340-400nm
3-14% and 6% in the wavelength range of 350-370 nm
It is.

The vapor pressure of the components contained in the filler affects the optical efficiency, but the quantitative proportions thereof are not sufficiently specified in the above-mentioned patents.

[Problem to be solved by the invention]

The object of the invention is to add new components to the filler used in the above-mentioned lamps and to change the proportions of the components of this filler.
An object of the present invention is to provide an ultraviolet metal halide lamp characterized by enhanced radiation efficiency in a wavelength range of 70 nm.

[Means to solve the problem]

The above-mentioned object comprises a glass bulb (1) made of transparent quartz glass, with electrodes (3, 4) inside (2) of the glass bulb.
In an ultraviolet metal halide lamp containing a filler containing mercury, iodine and/or bromine, iron, cobalt, nickel and an inert gas, according to the invention, said filler is doped with lead. and the following component S in the following ratio (mg/ci) Mercury 0.31400 to 5.246
00 Iodine and/or Bromine 0.03100-1.0
9860 iron 0.00
500~0.03500 cobalt 0
．． 00450~0.03500 nickel
0.00010~0.02000 lead
This is achieved by an ultraviolet metal halide lamp characterized in that it consists of 0.00584 to 0.12100.

The ratio of filler components used in the ultraviolet metal halide lamp proposed in this invention is such that the radiation efficiency (ra
357 nm in the emission spectrum of the lamp makes it possible to increase the diant efficiency).
Luminescent metals in the discharge through the additional appearance of (lead) lines at 364 nm + 367 nm, 368 nm and 374 nm and the formation of complexes from compounds of the components of the filler in the lamp: iron, By increasing the concentration of cobalt and nickel.

If the amount of filler component in the ultraviolet metal halide lamp proposed herein is less than the specified amount mentioned above,
The radiation efficiency decreases because the concentration of discharge self-luminous atoms is insufficient.

If the amount of filler component exceeds the specified amount mentioned above, the radiation efficiency also decreases, due to the excessive concentration of luminescent atoms in the discharge reducing the discharge temperature.

When the concentration of mercury is less than 0.31400 mg/Crl, the line broadening of the luminescent atoms is found to be insufficient.
This makes the increase in radiation efficiency insufficient.

The concentration of iodine and/or bromine is 0.0310 mg/
Below the ctl, the luminescent metal is not sufficiently bound to the corresponding halide, which leads to a decrease in the concentration of the luminescent metal in a discharge manner and to an increase in the luminescent metal onto the wall of the glass bulb of the UV metallolide lamp. lead to condensation.

As a result, radiation efficiency decreases.

A lead concentration higher than 0.1210 mg/ci results in a decrease in the radiation efficiency of iron, cobalt and nickel atoms. In the emission spectrum, the lead line becomes dominant, which reduces the radiation efficiency in a wider wavelength range than 350-370 nm, ie in the range 340-400 nm.

Iodine and/or bromine concentration is 1.0986mg/cI
If it is higher than II, it becomes difficult to start the arc discharge required to operate the ultraviolet metal halide lamp proposed herein.

The ultraviolet metal halide lamp according to the present invention is 350~3
Enhanced radiation efficiency in the wavelength range of 70 nm (7,8-9
%) and an increased radiation efficiency (18.1-25%) also in the wavelength range of 340-400 nm.

The radiation efficiency values mentioned above are approximately 1.5 times higher than those of prior art ultraviolet metal halide lamps (US Pat. No. 4,155,025).

Furthermore, the ultraviolet metal halide lamp proposed in this specification has an emission spectrum in the range specified above (350 to 3
The stability of the radiation efficiency over time at 70 nm and 340-4001 m) is high, and this stability is characterized by the fact that the radiation efficiency remains at a level of more than 80% of the initial value 500 hours after the start of lamp operation.

The ultraviolet metal halide lamp according to the present invention is notable for reliable starting.

In view of the foregoing, the ultraviolet metal halide lamp proposed herein is useful for phototechnical processes and phototherapy, including uses such as irradiation of photosensitive polymer transfer layers in the manufacture of printed circuit boards and printed forms. There are many applications.

[Example of implementation]

The invention will now be described by way of example embodiments of the invention in conjunction with the accompanying drawings.

As shown in the drawings, the ultraviolet metal halide lamp of the present invention has a glass bulb made of translucent quartz glass.
) 1. The interior 2 of the glass bulb is filled with an inert gas and a filler. The filler has the following proportion (m
It consists of the following components in g/Cl11).

Mercury 0.31400-5.24
600 Iodine and/or Bromine 0.03100-1.
09860 Iron 0.00
500~0.03500 cobalt 0
．． 00450~0.03500 nickel
0.00010~0.02000 lead
0.00584-0.12100 The interior 2 of the glass bulb 1 houses the electrodes 3,4.

Other structural elements of the UV metal halide lamp of the invention are not shown in the drawings.

[Function] The ultraviolet metal halide lamp of the present invention operates as follows.

After energizing the electrodes 3 and 4, an arc discharge occurs in the inert gas and then in the mercury vapor. The wall of the glass bulb 1 is heated and subsequently iodine and/or bromine and mercury evaporate from the wall of the glass bulb 1. The resulting vapors of iodine and/or bromine react with iron, cobalt, nickel and lead to form the respective iodides and/or bromides. As these compounds are gradually formed, they pass into the discharge region in the mercury vapor where they dissociate with the liberation of atoms of the aforementioned metal, which leads to the emission lines of the metal. give characteristics. The increase in luminescent metal concentration within the discharge is due to the formation of complexes based on these metals. The products of dissociation of these complexes diffuse out of the discharge region and enter the lower temperature region where they return to iron, cobalt, and
It becomes iodide and/or bromide of nickel and lead.

These compounds then move back to the mercury discharge region where complex compounds are formed.

In order to provide a detailed explanation of the present invention, the following examples of embodiments of the ultraviolet metal halide lamp proposed herein are presented.

Embodiment 1 The ultraviolet metal halide lamp according to the present invention shown in the attached drawings comprises an optically transparent glass bulb 1 made of quartz glass, the inside of which is filled with an inert gas (2.7 KPa pressure).
argon) and a filler, and an electrode 3.4 is housed therein. This filler has the following ratio (mg/cI11)
It consists of the following ingredients.

Mercury 0.51300 Iodine 0.10216 Iron 0.00500 Cobalt
0.00450 Nickel 0.00100 Lead 0.00584 This lamp is connected to a circuit with a conventional choke coil,
Tested at a supply voltage of 0 V and a frequency of 501 (z). At a lamp power of 1.5 kW, the radiation efficiency values of the lamp are 8.2% and 18.2% in the wavelength ranges 350-370 nm and 340-400 nm, respectively. Met.

Example 2 An ultraviolet metal halide lamp was made as described in Example 1, and the filler consisted of the following components in the following proportions (mg/c++f):

Mercury 0.51000 Iodine 0.03100 Iron 0.00500 Cobalt
0.00450 Nickel 0.00010 Lead 0.00584 The radiation efficiency value of this lamp with a lamp power of 1.5 kW is wavelength 350-3
They were 7.8% and 18.2% in the 70 nm and 340-400 nm ranges, respectively.

Example 3 An ultraviolet metal halide lamp was made as described in Example 1, and the filler consisted of the following components in the following proportions (mg 10+l):

Mercury 1.40920 Iodine 0.36160 Iron 0.02600 Cobalt
0.01200 Nickel 0.00400 Lead 0.01708 The radiation efficiency value of this lamp with a lamp power of 1.5 kW is wavelength 350-3
They were 9% and 25% in the 70 nm and 340-400 nm ranges, respectively.

Example 4 An ultraviolet metal halide lamp was made as described in Example 1, and the filler consisted of the following components in the following proportions (mg/cnf):

Mercury 1.43400 Iodine 0.01927 Bromine 0.26600 Iron 0.02700 Cobalt
0.01300 Nickel 0.00400 Lead 0.01573 The radiation efficiency value of this lamp with a lamp power of 1.5 kW is wavelength 350-3
They were 9% and 25% in the 70 nm and 340-400 nm ranges, respectively.

Example 5 An ultraviolet metal halide lamp was made as described in Example 1, and the filler consisted of the following components in the following proportions (mg/Cl11):

Mercury 5.24600 Iodine 1.09805 Iron 0.0350 (1 cobalt
0.03500 Nickel 0.02000 Lead 0.12100 The radiation efficiency value of this lamp with a lamp power of 1.5 kW is at wavelength 35(]-3
They were 8.4% and 18.2% in the 70 nm and 340-400 nm ranges, respectively.

Example 6 An ultraviolet metal halide lamp was made as described in Example 1, and the filler consisted of the following components in the following proportions (mg/crt):

Mercury 4.97000 Iodine 0.14860 Bromine 0.53200 Iron 0.03500 Cobalt
0.03500 Nickel 0.02000 Lead 0.12100 The radiation efficiency value of this lamp with a lamp power of 1.5 kW is wavelength 350-3
They were 8.4% and 18.3% in the 70 nm and 340-400 nm ranges, respectively.

Example 7 An ultraviolet metal halide lamp was made as described in Example 1, and the filler consisted of the following components in the following proportions (mg/c++I):

Mercury 0.31400 Iodine 0.59160 Bromine 0.17740 Iron 0.02800 Cobalt
0.02800 Nickel 0.01400 Lead 0.02700 The radiation efficiency value of this lamp with a lamp power of 1.5 klA is wavelength 350-3
They were 7.8% and 18.5% in the 70nm and 340-400nlT+ ranges, respectively.

Example 8 An ultraviolet metal halide lamp was made as described in Example 1, and the filler consisted of the following components in the following proportions (mg/cffl):

Mercury 4.97000 Iodine 0.02000 Bromine 0.01100 Iron 0.03500 Cobalt
0.03500 Nickel 0.02000 Lead 0.12100 The radiation efficiency value of this lamp with a lamp power of 1.5 kW is wavelength 350-3
They were 8.5% and 19.8% in the 70 nm and 340-400 nm ranges, respectively.

Example 9 An ultraviolet metal halide lamp was made as described in Example 1, and the filler consisted of the following ingredients in the following proportions (mg/cut):

Mercury 1.43400 Iodine 0.09860 Bromine 1.00000 Iron 0.03500 Cobalt
0.03500 Nickel 0.02000 Lead 0.12100 The radiation efficiency value of this lamp with a lamp power of 1.5 kW is wavelength 350-3
They were 8.3% and 18.1% in the 70 nm and 340-400 nm ranges, respectively.

[Effects of the Invention] From the data mentioned above, the ultraviolet metal halide lamp according to the present invention has a radiation efficiency of 7 in the wavelength range of 350 to 3701 m.
．． 8-9% and 18. in the wavelength range of 340-4001 m.
1-25%.

These radiation efficiency values are approximately 1.5 higher than conventional ultraviolet metal halide lamps (US Pat. No. 4,155,025).
twice as expensive.

Furthermore, the ultraviolet metal halide lamp according to the present invention has a specific wavelength range (350 to 370 nm and 340 to 400 nm).
The radiation efficiency (nm) is stable for a long time, which is a characteristic that the radiation efficiency is maintained at a level of 80% or more of the initial value after 1500 hours from the start of use of the lamp.

The ultraviolet metal halide lamp of the present invention is reliable in starting.

Therefore, the ultraviolet metal halide lamp proposed herein can be effectively used in phototechnical processes, including applications such as irradiation of photosensitive polymer transfer layers in the manufacture of printed circuit boards and printing forms, or in phototherapy. be done.

[Brief explanation of the drawing]

The drawing is a longitudinal sectional view of an ultraviolet metal halide lamp according to the present invention. 1... Glass bulb, 3.4... Electrode. 2... Inside,

Claims (1)

[Claims] 1. Comprising a glass bulb (1) made of translucent quartz glass, housing electrodes (3, 4) inside the glass bulb (2), and containing mercury, iodine and/or bromine, iron, cobalt, In an ultraviolet metal halide lamp in which a nickel-containing filler and an inert gas are enclosed, the filler additionally contains lead and contains the following components in the following proportions (mg/cm^3): mercury 0. 31400-5.24600 Iodine and/or Bromine 0.03100-1.09860
Iron 0.00500~0.03500 Cobalt 0.00
450~0.03500 Nickel 0.00010~0
．． 02000 An ultraviolet metal halide lamp comprising 0.00584 to 0.12100 lead.