Light emitting plasma lamp bulb for solar UV simulation and lamp comprising the same

Patent metadata

Field	Value
Publication number	US-12586772-B2
Application number	US-202318450756-A
Country	US
Kind code	B2
Filing date	Aug 16, 2023
Priority date	Aug 17, 2022
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

A light-emitting plasma lamp bulb for solar ultraviolet simulation includes a bulb cover having a spherical shape or a rod shape through which ultraviolet rays are transmittable, discharge gas contained in the bulb cover, and a first light-emitting material and a second light-emitting material, wherein the first light-emitting material includes at least one of mercury (Hg) and mercury iodide (HgI 2 ), and the second light-emitting material includes sulfur (S 8 ), wherein light emitted from the bulb has a maximum optical power intensity in a range of 395 to 455 nm which is an ultraviolet-visible boundary region, wherein, when compared using a same ultraviolet dose in an ultraviolet region of 290 to 400 nm, an integrated intensity of a visible and infrared region of 400 to 850 nm is equal to or less than ⅕ of an integrated intensity of a visible and infrared region of a standard solar spectrum (ASTM G173, AM 1.5G).

First claim

What is claimed is:

1 . A light-emitting plasma lamp bulb for solar ultraviolet simulation, comprising:
a bulb cover having a spherical shape or a rod shape through which ultraviolet rays are transmittable; discharge gas contained in the bulb cover; and a first light-emitting material and a second light-emitting material, wherein the first light-emitting material comprises at least one of mercury (Hg) and mercury iodide (HgI 2 ), and the second light-emitting material comprises sulfur (S 8 ), wherein light emitted from the bulb has a maximum optical power intensity in a range of 395 to 455 nm which is an ultraviolet-visible boundary region, wherein, when compared using a same ultraviolet dose in an ultraviolet region of 290 to 400 nm, an integrated intensity of a visible and infrared region of 400 to 850 nm is equal to or less than ⅕ of an integrated intensity of a visible and infrared region of a standard solar spectrum (ASTM G173, AM 1.5G).

2 . The light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 , wherein an inner diameter of the bulb cover is within a range of 30 to 50 mm.

3 . The light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 , wherein a content of the second light-emitting material per volume of the bulb cover ranges from 0.05 to 0.5 mg/cm 3 .

4 . The light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 , wherein a content of the at least one of the mercury and the mercury iodide included in the first light-emitting material is 10 to 30 times a content of sulfur based on a weight ratio.

5 . The light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 , wherein the light-emitting plasma lamp bulb for solar ultraviolet simulation ionizes a light-emitting material with high-power high-frequency energy having a power consumption of 1 kW or more to emit light simulating solar ultraviolet rays of a continuous spectrum in an excited state in plasma.

6 . The light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 , wherein the light-emitting plasma lamp bulb for solar ultraviolet simulation applies a daylight filter that blocks short-wavelength ultraviolet rays of 300 nm or less so that, based on an integrated area (W/m 2 ) of a solar ultraviolet wavelength range, a region of 290 to 320 nm is adjusted within a range of 2.6 to 7.9%, a region of 320 to 360 nm is adjusted within a range of 28.2 to 39.8%, and a region of 360 to 400 nm is adjusted within a range of 54.2 to 67.5%.

7 . The light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 , wherein the light-emitting plasma lamp bulb for solar ultraviolet simulation has a maximum value in 395 to 455 nm which is an ultraviolet-visible boundary region, and a ratio of an integrated irradiation intensity of an infrared region of 800 to 2,450 nm is 5% or less with respect to an integrated irradiation intensity of an ultraviolet and visible region of 800 nm or less.

8 . The light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 , wherein, when the mercury and the mercury iodide are used as a mixture, a mixing ratio of the mercury and the mercury iodide ranges from 1:0.2 to 1:5.

9 . The light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 , wherein the discharge gas is at least one gas material from among neon, argon, krypton, and xenon gas.

10 . The light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 , wherein the discharge gas is contained at a charging pressure of 5 to 300 torr.

11 . The light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 , wherein the bulb cover is formed of quartz or synthetic quartz.

12 . A light-emitting plasma lamp for solar ultraviolet simulation comprising the light-emitting plasma lamp bulb for solar ultraviolet simulation according to claim 1 .

13 . The light-emitting plasma lamp for solar ultraviolet simulation according to claim 12 , wherein the light-emitting plasma lamp for solar ultraviolet simulation comprises a lamp module designed to maintain an outer surface temperature of the light-emitting plasma lamp bulb for solar ultraviolet simulation at 900° C. or less.

14 . The light-emitting plasma lamp for solar ultraviolet simulation according to claim 13 , wherein the lamp module comprises an air-cooled cooling device in which local blowing and exhausting to a bulb surface is performed through a gap between a bulb cover connecting rod and a plasma lamp waveguide or a gap designed in a reflector surrounding the bulb to maintain a surface temperature of the light-emitting plasma lamp bulb for solar ultraviolet simulation at 900° C. or less.

15 . The light-emitting plasma lamp for solar ultraviolet simulation according to claim 13 , wherein the lamp module comprises a thermometer or a temperature sensor for measuring or detecting a temperature of an outer surface of the bulb to control the temperature of the outer surface of the bulb and perform an emergency stop function of cutting off lamp power except for a cooling device when abnormality occurs in temperature control.

16 . The light-emitting plasma lamp for solar ultraviolet simulation according to claim 12 , wherein the light-emitting plasma lamp for solar ultraviolet simulation is applied to a high-power light-emitting plasma lamp having a power consumption of 1 kW or more and 6 kW or less.

17 . The light-emitting plasma lamp for solar ultraviolet simulation according to claim 12 , wherein the light-emitting plasma lamp for solar ultraviolet simulation is applied to a sterilization device using solar ultraviolet simulation, an optical and inspection device for ultraviolet fluorescence, a chemical reaction and resin curing device using an ultraviolet photoreaction, a photodegradation test device by solar ultraviolet rays, a device for creating a growing environment for animals, plants, and microorganisms, and a health or medical device for vitamin D production.

Assignees

• Korea Res Inst Chemical Tech

Inventors

• Byun Doo Jin
• Yoo Min Jae

Classifications

• H01J61/322

  Circular lamps · CPC title

• H01J61/523

  Heating or cooling particular parts of the lamp · CPC title

• H01J65/04

  Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating {plasma display panels} · CPC title

• H01J61/72

  having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury · CPC title

• H01J61/16 Primary

  having helium, argon, neon, krypton, or xenon as the principle constituent · CPC title