Filled up with fuel at my local Morrison's yesterday and in the forecourt shop they had laser straight line generators for £4:99!
About the size of a tape rule, takes 2 x AAA's and projects a line rather than a dot. Very useful!
Accuracy claimed +/- 0.55" @ 30'.
I found a really handy use for a laser line generator. Place in garage, on a line with where your dominant eye ends up when driving.
With a few moments practice, this lets you park the car to within 2cm or so. You don't look at the laser, but the scattered light from the windscreen tells you when you are a bit offline.
Did you buy one, & if so, is it any good ?.
TIA
woodglass...
I did! I haven't tried it in anger yet, but it does project an easy to see line the length of a 14' long wall.
It has two small spirit level bubbles, not sure if I'd trust them 100%, but all I want is a straight line.
Depending on the optics used to make the line, it might not be that straight... The line from my twenty quid laser level (inc tripod a leveling head etc) is not straight at the extremities.
I've not seen it mentioned but Lidl are doing their £9.99 laser level from tomorrow again.
I'm not sure quite how good the level is in the Lidl item but the laser bit is considerably brighter than others that I have tried. I used the head, without the tripod, to set up some rather awkward founds recently and found it very effective. For =A310 well worth it.
Rob
Hi, not sure what you mean here - do you mean beam spread causing a rising or lowering line depending on the top or bottom of it? As light travels in straight lines I pondered on the 'extremities' :)
The bending is caused by a slight misalignment of the lens that converts the spot beam into a line. It could probably be corrected by realigning the lens more accurately at right-angles to the beam, but with a product that sells for only 19 quid (and probably cost about 6d to make) that all seems like 'effort worthy of a better cause'.
The laser diode only generates a spot, something has to spread that into a line. On mine the ends of the line fade out but also curve very slightly from true, very exagerated like a curved brace "(". Reality is not much more than a mm over a meter or so from the center.
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