WO1991004469A1 - An ultraviolet radiation dosimeter - Google Patents

An ultraviolet radiation dosimeter Download PDF

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Publication number
WO1991004469A1
WO1991004469A1 PCT/GB1990/001397 GB9001397W WO9104469A1 WO 1991004469 A1 WO1991004469 A1 WO 1991004469A1 GB 9001397 W GB9001397 W GB 9001397W WO 9104469 A1 WO9104469 A1 WO 9104469A1
Authority
WO
WIPO (PCT)
Prior art keywords
ultraviolet radiation
dosimeter
user
sensor
time
Prior art date
Application number
PCT/GB1990/001397
Other languages
French (fr)
Inventor
Mark Lincoln
Original Assignee
Ruger Design Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GB898920586A external-priority patent/GB8920586D0/en
Priority claimed from GB898922888A external-priority patent/GB8922888D0/en
Application filed by Ruger Design Limited filed Critical Ruger Design Limited
Publication of WO1991004469A1 publication Critical patent/WO1991004469A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
    • G01J1/429—Photometry, e.g. photographic exposure meter using electric radiation detectors applied to measurement of ultraviolet light

Definitions

  • This invention relates to an ultraviolet radiation dosimeter which can used, inter alia, as a sunbathing aid to assist a sunbather to achieve a healthy tan.
  • sun protection products e.g. suntan lotions and creams
  • sun protection product e.g. suntan lotions and creams
  • an ultraviolet radiation dosimeter comprising a sensor for producing a signal representative of the intensity of ultraviolet radiation received by the sensor, means for entering a parameter corresponding to the type of skin of a user, means for entering a parameter corresponding to the protection factor of a sun protection product used by a user, and display means for indicating an estimate of the time suitable for exposure of such skin treated with such sun protection product to the sensed ultraviolet radiation.
  • Tanning increases a sunbather's tolerance to further doses of ultraviolet radiation and, accordingly, the dosimeter advantageously further comprises means for entering a parameter corresponding to a degree of previously accumulated tan of a user.
  • the dosimeter comprises means for calculating an estimate of a maximum permissible dose of ultraviolet radiation according to the entered parameters and for indicating on the display means a time determined from the estimate of the maximum permissible dose and the intensity of ultraviolet radiation sensed by the sensor.
  • the dosimeter includes means whereby the time displayed by the display means changes as exposure continues in order to give an indication of the time remaining.
  • the dosimeter includes means whereby the time displayed by the display means takes into account variations in radiation intensity sensed by the sensor as exposure continues.
  • the radiation responsible for causing reddening (erythema) of the skin is predominantly UV-B radiation and, accordingly, the sensor is preferably responsive to radiation predominantly in the UV-B bandwith.
  • the dosimeter further comprises warning means for alerting a user when the time suitable for exposure is about to be or has been exceeded.
  • the dosimeter may be packaged in a casing resembling a pocket calculator and the aforesaid parameters may be entered by simple manual operation of buttons.
  • the user may press a start button and the calculated time for exposure will then show on the display means.
  • the displayed time may alter as exposure continues to indicate the time remaining having regard to the sensed radiation at any particular moment, and when the time remaining reaches zero, an alarm, such as a buzzer, may sound.
  • an alarm such as a buzzer
  • the user will then know it is time to turn over or seek shade.
  • the time calculated by the dosimeter may be used as a guide to the time the user can safely remain exposed to the sun.
  • Figure 1 is perspective view of one embodiment of an ultraviolet radiation dosimeter according to the present invention
  • Figure 2 is a block circuit diagram of the dosimeter of Figure 1
  • FIG 3 is a plan view of the display of the dosimeter of Figure 1, on an enlarged scale.
  • the ultraviolet radiation dosimeter shown therein is intended for use as a sunbathing aid and comprises a casing 10 having an openable coyer 11 hinged to the front face of the casing 10.
  • a sensor 12 comprising a photodiode and filter system is provided on the front face of the casing 10 so as to be exposed regardless of whether the cover 11 is open or closed. Beneath the cover 11, there is a key pad 13 and a liquid crystal display 14.
  • the filter system is selected so that the sensor 12 produces an output representative of the intensity of radiation responsible for causing reddening
  • the key pad 13 includes a mode button 15, a start button 16, a stop button 17, and a "+ 11 18.
  • the dosimeter can also operate as a real-time clock (and possibly also an alarm) , and in this case the mode button will enable a user to select real-time operation or operation as the sunbathing aid. It will also enable a user to enter appropriate parameters which have a bearing on the time for which the user may safely remain exposed to the sun. These include the skin type of the user, the protection factor of a sun protection product, e.g. a suntan lotion or cream, applied to a user's body, and a suntan accumulation factor.
  • a sun protection product e.g. a suntan lotion or cream
  • the dosimeter also comprises a pulse generator 19 and a microprocessor 20 both of which are powered by a battery 21.
  • the pulse generator 19 is responsive to the output of the sensor 12 and is designed so as to emit a string of pulses having a pulse rate which is proportional to the local intensity of erythemally active radiation sensed by the sensor 12. Each pulse, therefore, represents a quantum packet of energy.
  • the microprocessor 20 calculates an estimate of time a user may remain exposed to the sun before receiving a minimum erythemal dose (1 MED) based on information entered via the key pad 13 and the local intensity of erythemally active radiation sensed by the sensor 12.
  • the MED is a medically recognised estimate of the energy density that will result in eventual perceptible reddening (erythema) of the skin. For "average" fair skin the limit in energy density is approximately 15 mJ/sq.cm.
  • the dosimeter is designed to accommodate these variations by using the standard classifications for skin type, estimates of the degree of previously; accumulated tan and the protection factor of the sun protection product used. This information is entered by pressing the operating buttons 15 to 18 in an appropriate manner.
  • the dosimeter may, for example, accommodate five of the recognised skin types ranging from Type 1 (redhead) to Type 5 (semi-tanned oriental) .
  • the classification description will be provided with the operating instructions for the dosimeter.
  • the user enters his/her skin type number using the mode button 15 and the "+" button 18.
  • the appropriate icon 22 (see Figure 3) for skin type will flash on the display 14 as this information is entered and the skin type entered will appear in place of the time display 23.
  • the dosimeter contains, in the non-volatile memory of its microprocessor 20, accepted estimates of the 1 MED energy density factor for each skin type.
  • the dosimeter may accommodate sun protection factors from 1 (no protection used) to say 24 (which gives a very high level of protection) .
  • This number is provided by the manufacturers of all proprietary sun protection products and indicates the attenuation factor that a recommended thickness of application will impose on the incident UV-B radiation. It implies that users will be able to extend their exposure to the sun by that factor times longer than should be endured by the unprotected skin.
  • the user enters the sun protection factor of the product he/she is using using the mode button 15 and the "+" button 18.
  • the appropriate icon 24 for sun protection factor will flash on the display 14 as this information is entered and the protection factor entered will appear in place of the time display 23.
  • Tanning increases a sunbather's tolerance to further doses of radiation and consequently it is preferable that the dosimeter should be able to take account of any previously accumulated tan. Provision may therefore be made for a user to enter an estimate of the number of days which have recently been spent acquiring a radiation exposure of 1 MED/day using the mode button 15 and the "+" button 18 and this information may be used by the dosimeter to calculate a day accumulation factor by which it can modify the estimate of the MED limit for the current user.
  • the appropriate icon 25 for day accumulation factor will flash on the display 14 as this information is entered and the number of days entered will appear in place of the time display 23.
  • the microprocessor 20 calculates an estimate of the maximum permissible dose for the user by multiplying the "average" MED by the skin type energy density factor, the sun protection factor and the day accumulation factor and stores the result of this calculation as a number corresponding to the number of sensor pulses equating to such a dose, in a digital counter module.
  • the microprocessor 20 receives a pulse from the pulse generator 19, a unit is subtracted from the counter and the number remaining in the counter is next used to estimate the remaining permissible sunbathing time. This calculation is performed at frequent intervals by obtaining a digital figure for the current pulse rate and performing a calculation to reveal the remaining sunbathing time.
  • the microprocessor 20 energises a warning device, such as a buzzer 26 (see Figure 2) , for a limited time to alert the user.
  • a warning device such as a buzzer 26 (see Figure 2)
  • the stop button 17 may be pressed to stop the count prematurely or with appropriate circuitry may be pressed to pause the count while a user takes temporarily to the shade.
  • the dosimeter described above is given by way of example only and various modifications will be apparent to persons skilled in the art without departing from the scope of the invention.
  • the dosimeter may simply sense the intensity of radiation at a specific instant when an appropriate button, e.g. a start button, is depressed and display the safe exposure time for a user having regard to the intensity of radiation at the sensed moment and to an entered skin type and protection product protection factor. The user will then take a note of the time displayed and can use this as a guide to the time he/she can remain exposed to the sun.
  • the dosimeter could be used with artificial suntanning devices, such as sun lamps and sun beds, and in this case could be built into the device. Indeed, the dosimeter could be arranged to switch off the sun lamp or sun bed when the safe exposure time is reached or exceeded. However, when used with artificial suntanning devices, the response of the sensor will need to be different from that used to sense the intensity of radiation received from the sun.

Abstract

An ultraviolet radiation dosimeter comprises a sensor (12) for producing a signal representative of the intensity of ultraviolet radiation received by the sensor, and a keypad (13) for entering parameters corresponding to the type of skin of a user, the protection factor of a sun protection product used by the user, and also a degree of previously accumulated tan of a user. A microprocessor calculates an estimate of a maximum permissible dose of ultraviolet radiation according to the entered parameters and a suitable exposure time determined from the estimate of the maximum permissible dose and the intensity of ultraviolet radiation sensed by the sensor is displayed on a display (14). The dosimeter may also have an alarm for alerting a user when the time suitable for exposure is about to be or has been exceeded.

Description

AN ULTRAVIOLET RADIATION DOSIMETER This invention relates to an ultraviolet radiation dosimeter which can used, inter alia, as a sunbathing aid to assist a sunbather to achieve a healthy tan.
The effect of the sun can vary enormously, and it is a common fault for people on holiday, especially in climates hotter than they are used to, to over-expose themselves. Instead of a pleasing tan, they end up red and sore, which is not only uncomfortable, but can be dangerous.
Some people can safely sunbathe longer than others because of the nature of their skin. Also, there are sun protection products, e.g. suntan lotions and creams, of different strengths and there is an accepted numbering system indicating the protection factor of these products. However, without specialist knowledge, it is a somewhat hit-and-miss affair for a person to use the most suitable sun protection product for the appropriate time.
According to the present invention, there is provided an ultraviolet radiation dosimeter comprising a sensor for producing a signal representative of the intensity of ultraviolet radiation received by the sensor, means for entering a parameter corresponding to the type of skin of a user, means for entering a parameter corresponding to the protection factor of a sun protection product used by a user, and display means for indicating an estimate of the time suitable for exposure of such skin treated with such sun protection product to the sensed ultraviolet radiation.
Tanning increases a sunbather's tolerance to further doses of ultraviolet radiation and, accordingly, the dosimeter advantageously further comprises means for entering a parameter corresponding to a degree of previously accumulated tan of a user.
Preferably, the dosimeter comprises means for calculating an estimate of a maximum permissible dose of ultraviolet radiation according to the entered parameters and for indicating on the display means a time determined from the estimate of the maximum permissible dose and the intensity of ultraviolet radiation sensed by the sensor.
Preferably, the dosimeter includes means whereby the time displayed by the display means changes as exposure continues in order to give an indication of the time remaining. Preferably, the dosimeter includes means whereby the time displayed by the display means takes into account variations in radiation intensity sensed by the sensor as exposure continues.
The radiation responsible for causing reddening (erythema) of the skin is predominantly UV-B radiation and, accordingly, the sensor is preferably responsive to radiation predominantly in the UV-B bandwith. Preferably, the dosimeter further comprises warning means for alerting a user when the time suitable for exposure is about to be or has been exceeded.
The dosimeter may be packaged in a casing resembling a pocket calculator and the aforesaid parameters may be entered by simple manual operation of buttons.
When the parameters have been entered, the user may press a start button and the calculated time for exposure will then show on the display means. The displayed time may alter as exposure continues to indicate the time remaining having regard to the sensed radiation at any particular moment, and when the time remaining reaches zero, an alarm, such as a buzzer, may sound. The user will then know it is time to turn over or seek shade. Alternatively, the time calculated by the dosimeter may be used as a guide to the time the user can safely remain exposed to the sun.
The invention will now be more particularly described, by way of example, with reference to the accompanying drawings, in which:-
Figure 1 is perspective view of one embodiment of an ultraviolet radiation dosimeter according to the present invention, Figure 2 is a block circuit diagram of the dosimeter of Figure 1, and
Figure 3 is a plan view of the display of the dosimeter of Figure 1, on an enlarged scale. Referring firstly to Figure 1 of the drawings, the ultraviolet radiation dosimeter shown therein is intended for use as a sunbathing aid and comprises a casing 10 having an openable coyer 11 hinged to the front face of the casing 10. A sensor 12 comprising a photodiode and filter system is provided on the front face of the casing 10 so as to be exposed regardless of whether the cover 11 is open or closed. Beneath the cover 11, there is a key pad 13 and a liquid crystal display 14.
The filter system is selected so that the sensor 12 produces an output representative of the intensity of radiation responsible for causing reddening
(erythema) of the skin. As mentioned previously, this is predominantly UV-B radiation.
The key pad 13 includes a mode button 15, a start button 16, a stop button 17, and a "+11 18.
The dosimeter can also operate as a real-time clock (and possibly also an alarm) , and in this case the mode button will enable a user to select real-time operation or operation as the sunbathing aid. It will also enable a user to enter appropriate parameters which have a bearing on the time for which the user may safely remain exposed to the sun. These include the skin type of the user, the protection factor of a sun protection product, e.g. a suntan lotion or cream, applied to a user's body, and a suntan accumulation factor.
As shown in Figure 2, the dosimeter also comprises a pulse generator 19 and a microprocessor 20 both of which are powered by a battery 21. The pulse generator 19 is responsive to the output of the sensor 12 and is designed so as to emit a string of pulses having a pulse rate which is proportional to the local intensity of erythemally active radiation sensed by the sensor 12. Each pulse, therefore, represents a quantum packet of energy.
The microprocessor 20 calculates an estimate of time a user may remain exposed to the sun before receiving a minimum erythemal dose (1 MED) based on information entered via the key pad 13 and the local intensity of erythemally active radiation sensed by the sensor 12. The MED is a medically recognised estimate of the energy density that will result in eventual perceptible reddening (erythema) of the skin. For "average" fair skin the limit in energy density is approximately 15 mJ/sq.cm. Naturally, there is a wide range of skin types and conditions which can be protected by a wide variety of sun protection products, each combination requiring different energy densities to achieve perceptible erythema. The dosimeter is designed to accommodate these variations by using the standard classifications for skin type, estimates of the degree of previously; accumulated tan and the protection factor of the sun protection product used. This information is entered by pressing the operating buttons 15 to 18 in an appropriate manner.
The dosimeter may, for example, accommodate five of the recognised skin types ranging from Type 1 (redhead) to Type 5 (semi-tanned oriental) . The classification description will be provided with the operating instructions for the dosimeter. The user enters his/her skin type number using the mode button 15 and the "+" button 18. The appropriate icon 22 (see Figure 3) for skin type will flash on the display 14 as this information is entered and the skin type entered will appear in place of the time display 23. The dosimeter contains, in the non-volatile memory of its microprocessor 20, accepted estimates of the 1 MED energy density factor for each skin type. The dosimeter may accommodate sun protection factors from 1 (no protection used) to say 24 (which gives a very high level of protection) . This number is provided by the manufacturers of all proprietary sun protection products and indicates the attenuation factor that a recommended thickness of application will impose on the incident UV-B radiation. It implies that users will be able to extend their exposure to the sun by that factor times longer than should be endured by the unprotected skin. The user enters the sun protection factor of the product he/she is using using the mode button 15 and the "+" button 18. The appropriate icon 24 for sun protection factor will flash on the display 14 as this information is entered and the protection factor entered will appear in place of the time display 23.
Tanning increases a sunbather's tolerance to further doses of radiation and consequently it is preferable that the dosimeter should be able to take account of any previously accumulated tan. Provision may therefore be made for a user to enter an estimate of the number of days which have recently been spent acquiring a radiation exposure of 1 MED/day using the mode button 15 and the "+" button 18 and this information may be used by the dosimeter to calculate a day accumulation factor by which it can modify the estimate of the MED limit for the current user. The appropriate icon 25 for day accumulation factor will flash on the display 14 as this information is entered and the number of days entered will appear in place of the time display 23.
When the start button 15 of the dosimeter is pressed, the microprocessor 20 calculates an estimate of the maximum permissible dose for the user by multiplying the "average" MED by the skin type energy density factor, the sun protection factor and the day accumulation factor and stores the result of this calculation as a number corresponding to the number of sensor pulses equating to such a dose, in a digital counter module. Each time the microprocessor 20 receives a pulse from the pulse generator 19, a unit is subtracted from the counter and the number remaining in the counter is next used to estimate the remaining permissible sunbathing time. This calculation is performed at frequent intervals by obtaining a digital figure for the current pulse rate and performing a calculation to reveal the remaining sunbathing time. When this count in the counter is reduced to zero, the sunbather will have had approximately 1 MED for his/her skin type etc. At this stage, the microprocessor 20 energises a warning device, such as a buzzer 26 (see Figure 2) , for a limited time to alert the user.
The stop button 17 may be pressed to stop the count prematurely or with appropriate circuitry may be pressed to pause the count while a user takes temporarily to the shade. The dosimeter described above is given by way of example only and various modifications will be apparent to persons skilled in the art without departing from the scope of the invention. For example, the dosimeter may simply sense the intensity of radiation at a specific instant when an appropriate button, e.g. a start button, is depressed and display the safe exposure time for a user having regard to the intensity of radiation at the sensed moment and to an entered skin type and protection product protection factor. The user will then take a note of the time displayed and can use this as a guide to the time he/she can remain exposed to the sun. Also, the dosimeter could be used with artificial suntanning devices, such as sun lamps and sun beds, and in this case could be built into the device. Indeed, the dosimeter could be arranged to switch off the sun lamp or sun bed when the safe exposure time is reached or exceeded. However, when used with artificial suntanning devices, the response of the sensor will need to be different from that used to sense the intensity of radiation received from the sun.

Claims

1. An ultraviolet radiation dosimeter comprising a sensor for producing a signal representative of the intensity of ultraviolet radiation received by the sensor, means for entering a parameter corresponding to the type of skin of a user, means for entering a parameter corresponding to the protection factor of a sun protection product used by a user, and display means for indicating an estimate of the time suitable for exposure of such skin treated with such sun protection product to the sensed ultraviolet radiation.
2. An ultraviolet radiation dosimeter as claimed in Claim 1, further comprising means for entering a parameter corresponding to a degree of previously accumulated tan of a user.
3. An ultraviolet radiation dosimeter as claimed in Claim 1 or Claim 2, comprising means for calculating an estimate of a maximum permissible dose of ultraviolet radiation according to the entered parameters and for indicating on the display means a time determined from the estimate of the maximum permissible dose and the intensity of ultraviolet radiation sensed by the sensor.
4. An ultraviolet radiation dosimeter as claimed in any one of the preceding claims, wherein the dosimeter includes means whereby the time displayed by the display means changes as exposure continues to give an indication of the time remaining.
5. An ultraviolet radiation dosimeter as claimed in any one of the preceding claims, wherein the dosimeter includes means whereby the time displayed by the display means takes into account variations in radiation intensity sensed by the sensor as exposure continues.
6. An ultraviolet radiation dosimeter as claimed in any one of the preceding claims, wherein the sensor is responsive predominantly to UV-B radiation.
7. An ultraviolet radiation dosimeter as claimed in any one of the preceding claims, further comprising warning means for alerting a user when the time suitable for exposure is about to be or has been exceeded.
8. An ultraviolet radiation dosimeter as claimed in Claim 7, wherein the warning means comprises means for emitting an audible alarm.
9. An ultraviolet radiation dosimeter as claimed in any one of the preceding claims, wherein the display means is a liquid crystal display.
PCT/GB1990/001397 1989-09-12 1990-09-10 An ultraviolet radiation dosimeter WO1991004469A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8920586-8 1989-09-12
GB898920586A GB8920586D0 (en) 1989-09-12 1989-09-12 A device for guidance on sunbathing time
GB8922888-6 1989-10-11
GB898922888A GB8922888D0 (en) 1989-10-11 1989-10-11 A device for guidance on sunbathing time

Publications (1)

Publication Number Publication Date
WO1991004469A1 true WO1991004469A1 (en) 1991-04-04

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PCT/GB1990/001397 WO1991004469A1 (en) 1989-09-12 1990-09-10 An ultraviolet radiation dosimeter

Country Status (4)

Country Link
CN (1) CN2075788U (en)
AU (1) AU6344290A (en)
GB (1) GB2236182A (en)
WO (1) WO1991004469A1 (en)

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WO1993021503A1 (en) * 1992-04-13 1993-10-28 Reliant Laser Corporation Noseshade for monitoring exposure to ultraviolet radiation
EP0585670A2 (en) * 1992-08-12 1994-03-09 Reliant Laser Corporation Electro-optical system for measuring and analying accumulated short-wave and long-wave ultraviolet radiation exposure
US6389156B1 (en) * 1997-10-09 2002-05-14 Konica Corporation Method and apparatus for reading radiographic images
GB2408829A (en) * 2003-12-02 2005-06-08 Nissan Technical Ct Europ Ltd Cabriolet Vehicle With Solar Radiation Intensity Sensor
US7265358B2 (en) 2003-07-23 2007-09-04 L'oreal Device to prevent the risk of overexposure to harmful solar radiation
US8044363B2 (en) 2007-04-30 2011-10-25 Kimberly-Clark Worldwide, Inc. UV detection devices and methods

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US5640957A (en) * 1993-09-29 1997-06-24 Instruments Sa, Inc. Ultraviolet radiation protection evaluator
WO1997018447A1 (en) * 1995-11-14 1997-05-22 Tom Konstantin Abramovich Method of measuring ultraviolet light, device for applying said method and a photo-converter
WO2000079227A1 (en) * 1999-06-17 2000-12-28 Anton Ramsl System for determining the optimal insolation of a person
AT412128B (en) * 1999-06-17 2004-09-27 Anton Ramsl System for determining optimal solar radiation exposure for person indicates remaining exposure time derived from sun protection factor of sun protection medium
DE60114719T2 (en) * 2000-07-03 2006-07-20 Koninklijke Philips Electronics N.V. Method and device for optimizing the use of a tanning device
FR2814543A1 (en) * 2000-09-27 2002-03-29 Stocksun Ultraviolet meter for personal use in which operating parameters, skin type and protection cream, can be input using a menu system so that once a UV exposure is reached an alarm can be generated, preventing sun-burn
JP3556601B2 (en) 2001-02-01 2004-08-18 コナミ株式会社 Portable device and method
WO2003001164A1 (en) * 2001-06-21 2003-01-03 Imego Ab Ultraviolet detection sensor
CN1862628B (en) * 2006-06-19 2010-12-08 上海序参量科技发展有限公司 Display device with light shower function
ITVI20110202A1 (en) * 2011-07-26 2013-01-27 I So Italia S R L TANNING EQUIPMENT
CN103163545B (en) * 2013-02-26 2015-09-30 国电锅炉压力容器检验中心 A kind of ray meter measuring roentgen dose X
CN105893721A (en) * 2014-05-13 2016-08-24 陈威宇 Adaptive skin care information prompt system and adaptive skin care prompt method
CN105301799A (en) * 2015-10-30 2016-02-03 芜湖迈特电子科技有限公司 Glasses for warning about eye fatigue

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Cited By (7)

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Publication number Priority date Publication date Assignee Title
WO1993021503A1 (en) * 1992-04-13 1993-10-28 Reliant Laser Corporation Noseshade for monitoring exposure to ultraviolet radiation
EP0585670A2 (en) * 1992-08-12 1994-03-09 Reliant Laser Corporation Electro-optical system for measuring and analying accumulated short-wave and long-wave ultraviolet radiation exposure
EP0585670A3 (en) * 1992-08-12 1996-01-17 Reliant Laser Corp Electro-optical system for measuring and analying accumulated short-wave and long-wave ultraviolet radiation exposure
US6389156B1 (en) * 1997-10-09 2002-05-14 Konica Corporation Method and apparatus for reading radiographic images
US7265358B2 (en) 2003-07-23 2007-09-04 L'oreal Device to prevent the risk of overexposure to harmful solar radiation
GB2408829A (en) * 2003-12-02 2005-06-08 Nissan Technical Ct Europ Ltd Cabriolet Vehicle With Solar Radiation Intensity Sensor
US8044363B2 (en) 2007-04-30 2011-10-25 Kimberly-Clark Worldwide, Inc. UV detection devices and methods

Also Published As

Publication number Publication date
GB2236182A (en) 1991-03-27
AU6344290A (en) 1991-04-18
CN2075788U (en) 1991-04-24
GB9019751D0 (en) 1990-10-24

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